4WD part-time light question

I once did a poll here in this newsgroup. 62% of the readers who responded had
a 4X4 light on their Jeep that malfunctions somehow.

"Snow" > wrote in message
...
> Where would I find the switch, I haven't looked yet, or is it quite easy
> to
> see?
>
> Snow...

There's a vacuum switch on the xfer case with several hoses coming out of
it. They branch off to the vacuum motor on the axle, and a vaccum signal
coming from the intake manifol to a harness sorta deal mounted on the
firewall by the battery. There's an electrical switch on the axle vacuum
motor with one wire on it that goes through to the dash light: I.E., the
light comes on once the collar on the axle engages and trips the switch,
which grounds the light.

Ther's been several variations on this system over the years (before Jeep
finally just dumped it) but they all work essentially the same way.


> "RoyJ" > wrote in message
> news
>> Check the connection on the axle before pulling the dash off to get at
>> the bulbs. Put it in 4wd, move forward and backward a few feet to help
>> drop it in, see if the swich reads close to zero ohms. then see if the
>> connector is any good.
>>
>> Snow wrote:
>> > Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2
>> > of
>> > them slippery the other 2 were dry. I wasn't going fast and the 2
> corners
>> > that were dry I could feel the front wheels do the "hop" they do when
>> > in
> 4wd
>> > on a dry surface. I used to park in an semi underground parking lot,
>> > or
>> > rather had to drive through one to get to my parking spot and needed
>> > 4wd
>> > before I entered and after I exited to get into my spot (had turn a
> couple
>> > corners and the front would hop if it was in 4wd). I haven't checked
> the
>> > bulb yet, I'll do that tomorrow when I get home from work.
>> >
>> > Snow...
>> >
>> > "RoyJ" > wrote in message
>> > k.net...
>> >
>> >>The older YJ's and XJ's had a vacumn switch sitting up on the firewall,
>> >>right next to the battery. Switch cuts in only after the front axle is
>> >>locked. Newer models have the switch as an intergal part of the
>> >>diaphram
>> >>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
>> >>the XJ. You can easily check which you have: old units have 3 vac ports
>> >>on the axle, newer ones have 2 vac ports and a wire terminal.
>> >>
>> >>Did you actually get inot 4wd? Keep in mind that your transfer case can
>> >>switch into 4WD, your axle may not have made it. The light does not
>> >>come
>> >>on until it is locked. Usual problem is bad vac harnes, next is the
>> >>vac
>> >>switch on the tranny. Or just the usual assortment of bad wire, bunred
>> >>out bulb. Harness runs about $35 at the dealer, switch is about $16.
>> >>Lots of guys go with the manual cable, $200 as an accessory, less if
>> >>you
>> >>make your own.
>> >>
>> >>Snow wrote:
>> >>
>> >>>Just wondering what turns on and off the 4wd part-time and full-time
>> >
>> > lights
>> >
>> >>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
> indicator
>> >>>lights don't turn on. T-case still shifts and engages into both 4wd
>> >
>> > drive
>> >
>> >>>settings, this morning a few local roads were just slippery enough to
>> >
>> > allow
>> >
>> >>>me to shift into 4 high and try it. Does the light get turned on by
>> >
>> > the
>> >
>> >>>same vac. switch as the t-case?
>> >>>
>> >>>Snow...93 XJ
>> >>>
>> >>>
>> >
>> >
>> >
>
>

"Snow" > wrote in message
...
> Where would I find the switch, I haven't looked yet, or is it quite easy
> to
> see?
>
> Snow...

There's a vacuum switch on the xfer case with several hoses coming out of
it. They branch off to the vacuum motor on the axle, and a vaccum signal
coming from the intake manifol to a harness sorta deal mounted on the
firewall by the battery. There's an electrical switch on the axle vacuum
motor with one wire on it that goes through to the dash light: I.E., the
light comes on once the collar on the axle engages and trips the switch,
which grounds the light.

Ther's been several variations on this system over the years (before Jeep
finally just dumped it) but they all work essentially the same way.


> "RoyJ" > wrote in message
> news
>> Check the connection on the axle before pulling the dash off to get at
>> the bulbs. Put it in 4wd, move forward and backward a few feet to help
>> drop it in, see if the swich reads close to zero ohms. then see if the
>> connector is any good.
>>
>> Snow wrote:
>> > Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2
>> > of
>> > them slippery the other 2 were dry. I wasn't going fast and the 2
> corners
>> > that were dry I could feel the front wheels do the "hop" they do when
>> > in
> 4wd
>> > on a dry surface. I used to park in an semi underground parking lot,
>> > or
>> > rather had to drive through one to get to my parking spot and needed
>> > 4wd
>> > before I entered and after I exited to get into my spot (had turn a
> couple
>> > corners and the front would hop if it was in 4wd). I haven't checked
> the
>> > bulb yet, I'll do that tomorrow when I get home from work.
>> >
>> > Snow...
>> >
>> > "RoyJ" > wrote in message
>> > k.net...
>> >
>> >>The older YJ's and XJ's had a vacumn switch sitting up on the firewall,
>> >>right next to the battery. Switch cuts in only after the front axle is
>> >>locked. Newer models have the switch as an intergal part of the
>> >>diaphram
>> >>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
>> >>the XJ. You can easily check which you have: old units have 3 vac ports
>> >>on the axle, newer ones have 2 vac ports and a wire terminal.
>> >>
>> >>Did you actually get inot 4wd? Keep in mind that your transfer case can
>> >>switch into 4WD, your axle may not have made it. The light does not
>> >>come
>> >>on until it is locked. Usual problem is bad vac harnes, next is the
>> >>vac
>> >>switch on the tranny. Or just the usual assortment of bad wire, bunred
>> >>out bulb. Harness runs about $35 at the dealer, switch is about $16.
>> >>Lots of guys go with the manual cable, $200 as an accessory, less if
>> >>you
>> >>make your own.
>> >>
>> >>Snow wrote:
>> >>
>> >>>Just wondering what turns on and off the 4wd part-time and full-time
>> >
>> > lights
>> >
>> >>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
> indicator
>> >>>lights don't turn on. T-case still shifts and engages into both 4wd
>> >
>> > drive
>> >
>> >>>settings, this morning a few local roads were just slippery enough to
>> >
>> > allow
>> >
>> >>>me to shift into 4 high and try it. Does the light get turned on by
>> >
>> > the
>> >
>> >>>same vac. switch as the t-case?
>> >>>
>> >>>Snow...93 XJ
>> >>>
>> >>>
>> >
>> >
>> >
>
>

Mark12211 proclaimed:
> I once did a poll here in this newsgroup. 62% of the readers who responded had
> a 4X4 light on their Jeep that malfunctions somehow.

...the other poll found that 76% of all statistics are simply made up.

Mark12211 proclaimed:
> I once did a poll here in this newsgroup. 62% of the readers who responded had
> a 4X4 light on their Jeep that malfunctions somehow.

...the other poll found that 76% of all statistics are simply made up.

The switch is on top of the transfer case, almost impossible to see,
worse to get at. Not sure on the XJ but on the YJ you can pull the shift
boot and get a good look at it. It is a cylinder about 2" long with 3
vac ports coming out of it.

You can check the operation by starting the beast up, pull the vac plug
on the front axle and checking for a mild vac on one of the lines. Then
shift to 4wd, the vac should switch to the other line. No vac on either
says the line to the transfer case switch is bad. Not switching says the
transfer case switch itself is bad. Vac on one direction, not the other
says the vac harness is bad. Proper switching but no 4wd says the
diaphram is bad or the shift dog is stuck.

Snow wrote:
> Where would I find the switch, I haven't looked yet, or is it quite easy to
> see?
>
> Snow...
>
> "RoyJ" > wrote in message
> news >
>>Check the connection on the axle before pulling the dash off to get at
>>the bulbs. Put it in 4wd, move forward and backward a few feet to help
>>drop it in, see if the swich reads close to zero ohms. then see if the
>>connector is any good.
>>
>>Snow wrote:
>>
>>>Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2 of
>>>them slippery the other 2 were dry. I wasn't going fast and the 2
>
> corners
>
>>>that were dry I could feel the front wheels do the "hop" they do when in
>
> 4wd
>
>>>on a dry surface. I used to park in an semi underground parking lot, or
>>>rather had to drive through one to get to my parking spot and needed 4wd
>>>before I entered and after I exited to get into my spot (had turn a
>
> couple
>
>>>corners and the front would hop if it was in 4wd). I haven't checked
>
> the
>
>>>bulb yet, I'll do that tomorrow when I get home from work.
>>>
>>>Snow...
>>>
>>>"RoyJ" > wrote in message
link.net...
>>>
>>>
>>>>The older YJ's and XJ's had a vacumn switch sitting up on the firewall,
>>>>right next to the battery. Switch cuts in only after the front axle is
>>>>locked. Newer models have the switch as an intergal part of the diaphram
>>>>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
>>>>the XJ. You can easily check which you have: old units have 3 vac ports
>>>>on the axle, newer ones have 2 vac ports and a wire terminal.
>>>>
>>>>Did you actually get inot 4wd? Keep in mind that your transfer case can
>>>>switch into 4WD, your axle may not have made it. The light does not come
>>>>on until it is locked. Usual problem is bad vac harnes, next is the vac
>>>>switch on the tranny. Or just the usual assortment of bad wire, bunred
>>>>out bulb. Harness runs about $35 at the dealer, switch is about $16.
>>>>Lots of guys go with the manual cable, $200 as an accessory, less if you
>>>>make your own.
>>>>
>>>>Snow wrote:
>>>>
>>>>
>>>>>Just wondering what turns on and off the 4wd part-time and full-time
>>>
>>>lights
>>>
>>>
>>>>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
>
> indicator
>
>>>>>lights don't turn on. T-case still shifts and engages into both 4wd
>>>
>>>drive
>>>
>>>
>>>>>settings, this morning a few local roads were just slippery enough to
>>>
>>>allow
>>>
>>>
>>>>>me to shift into 4 high and try it. Does the light get turned on by
>>>
>>>the
>>>
>>>
>>>>>same vac. switch as the t-case?
>>>>>
>>>>>Snow...93 XJ
>>>>>
>>>>>
>>>
>>>
>>>
>
>

The switch is on top of the transfer case, almost impossible to see,
worse to get at. Not sure on the XJ but on the YJ you can pull the shift
boot and get a good look at it. It is a cylinder about 2" long with 3
vac ports coming out of it.

You can check the operation by starting the beast up, pull the vac plug
on the front axle and checking for a mild vac on one of the lines. Then
shift to 4wd, the vac should switch to the other line. No vac on either
says the line to the transfer case switch is bad. Not switching says the
transfer case switch itself is bad. Vac on one direction, not the other
says the vac harness is bad. Proper switching but no 4wd says the
diaphram is bad or the shift dog is stuck.

Snow wrote:
> Where would I find the switch, I haven't looked yet, or is it quite easy to
> see?
>
> Snow...
>
> "RoyJ" > wrote in message
> news >
>>Check the connection on the axle before pulling the dash off to get at
>>the bulbs. Put it in 4wd, move forward and backward a few feet to help
>>drop it in, see if the swich reads close to zero ohms. then see if the
>>connector is any good.
>>
>>Snow wrote:
>>
>>>Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2 of
>>>them slippery the other 2 were dry. I wasn't going fast and the 2
>
> corners
>
>>>that were dry I could feel the front wheels do the "hop" they do when in
>
> 4wd
>
>>>on a dry surface. I used to park in an semi underground parking lot, or
>>>rather had to drive through one to get to my parking spot and needed 4wd
>>>before I entered and after I exited to get into my spot (had turn a
>
> couple
>
>>>corners and the front would hop if it was in 4wd). I haven't checked
>
> the
>
>>>bulb yet, I'll do that tomorrow when I get home from work.
>>>
>>>Snow...
>>>
>>>"RoyJ" > wrote in message
link.net...
>>>
>>>
>>>>The older YJ's and XJ's had a vacumn switch sitting up on the firewall,
>>>>right next to the battery. Switch cuts in only after the front axle is
>>>>locked. Newer models have the switch as an intergal part of the diaphram
>>>>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
>>>>the XJ. You can easily check which you have: old units have 3 vac ports
>>>>on the axle, newer ones have 2 vac ports and a wire terminal.
>>>>
>>>>Did you actually get inot 4wd? Keep in mind that your transfer case can
>>>>switch into 4WD, your axle may not have made it. The light does not come
>>>>on until it is locked. Usual problem is bad vac harnes, next is the vac
>>>>switch on the tranny. Or just the usual assortment of bad wire, bunred
>>>>out bulb. Harness runs about $35 at the dealer, switch is about $16.
>>>>Lots of guys go with the manual cable, $200 as an accessory, less if you
>>>>make your own.
>>>>
>>>>Snow wrote:
>>>>
>>>>
>>>>>Just wondering what turns on and off the 4wd part-time and full-time
>>>
>>>lights
>>>
>>>
>>>>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
>
> indicator
>
>>>>>lights don't turn on. T-case still shifts and engages into both 4wd
>>>
>>>drive
>>>
>>>
>>>>>settings, this morning a few local roads were just slippery enough to
>>>
>>>allow
>>>
>>>
>>>>>me to shift into 4 high and try it. Does the light get turned on by
>>>
>>>the
>>>
>>>
>>>>>same vac. switch as the t-case?
>>>>>
>>>>>Snow...93 XJ
>>>>>
>>>>>
>>>
>>>
>>>
>
>

AFAIK there isn't a transfer case vacuum switch on the 93 XJ: that year
there was no vacuum disconnect on the front axle.

That said, the part-time light didn't work on my '93 XJ either, and I was
able to determine that the bulb was fine...so it was either in the wiring to
the transfer case or (most likely) the electrical switch in the transfer
case. I didn't think it was serious enough to mess with unless I had to take
the t-case apart for some reason.

"RoyJ" > wrote in message
nk.net...

>
> You can check the operation by starting the beast up, pull the vac plug
> on the front axle and checking for a mild vac on one of the lines. Then
> shift to 4wd, the vac should switch to the other line. No vac on either
> says the line to the transfer case switch is bad. Not switching says the
> transfer case switch itself is bad. Vac on one direction, not the other
> says the vac harness is bad. Proper switching but no 4wd says the
> diaphram is bad or the shift dog is stuck.
>
> Snow wrote:
> > Where would I find the switch, I haven't looked yet, or is it quite easy
to
> > see?
> >
> > Snow...
> >
> > "RoyJ" > wrote in message
> > news > >
> >>Check the connection on the axle before pulling the dash off to get at
> >>the bulbs. Put it in 4wd, move forward and backward a few feet to help
> >>drop it in, see if the swich reads close to zero ohms. then see if the
> >>connector is any good.
> >>
> >>Snow wrote:
> >>
> >>>Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2
of
> >>>them slippery the other 2 were dry. I wasn't going fast and the 2
> >
> > corners
> >
> >>>that were dry I could feel the front wheels do the "hop" they do when
in
> >
> > 4wd
> >
> >>>on a dry surface. I used to park in an semi underground parking lot,
or
> >>>rather had to drive through one to get to my parking spot and needed
4wd
> >>>before I entered and after I exited to get into my spot (had turn a
> >
> > couple
> >
> >>>corners and the front would hop if it was in 4wd). I haven't checked
> >
> > the
> >
> >>>bulb yet, I'll do that tomorrow when I get home from work.
> >>>
> >>>Snow...
> >>>
> >>>"RoyJ" > wrote in message
> link.net...
> >>>
> >>>
> >>>>The older YJ's and XJ's had a vacumn switch sitting up on the
firewall,
> >>>>right next to the battery. Switch cuts in only after the front axle is
> >>>>locked. Newer models have the switch as an intergal part of the
diaphram
> >>>>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
> >>>>the XJ. You can easily check which you have: old units have 3 vac
ports
> >>>>on the axle, newer ones have 2 vac ports and a wire terminal.
> >>>>
> >>>>Did you actually get inot 4wd? Keep in mind that your transfer case
can
> >>>>switch into 4WD, your axle may not have made it. The light does not
come
> >>>>on until it is locked. Usual problem is bad vac harnes, next is the
vac
> >>>>switch on the tranny. Or just the usual assortment of bad wire, bunred
> >>>>out bulb. Harness runs about $35 at the dealer, switch is about $16.
> >>>>Lots of guys go with the manual cable, $200 as an accessory, less if
you
> >>>>make your own.
> >>>>
> >>>>Snow wrote:
> >>>>
> >>>>
> >>>>>Just wondering what turns on and off the 4wd part-time and full-time
> >>>
> >>>lights
> >>>
> >>>
> >>>>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
> >
> > indicator
> >
> >>>>>lights don't turn on. T-case still shifts and engages into both 4wd
> >>>
> >>>drive
> >>>
> >>>
> >>>>>settings, this morning a few local roads were just slippery enough to
> >>>
> >>>allow
> >>>
> >>>
> >>>>>me to shift into 4 high and try it. Does the light get turned on by
> >>>
> >>>the
> >>>
> >>>
> >>>>>same vac. switch as the t-case?
> >>>>>
> >>>>>Snow...93 XJ
> >>>>>
> >>>>>
> >>>
> >>>
> >>>
> >
> >

AFAIK there isn't a transfer case vacuum switch on the 93 XJ: that year
there was no vacuum disconnect on the front axle.

That said, the part-time light didn't work on my '93 XJ either, and I was
able to determine that the bulb was fine...so it was either in the wiring to
the transfer case or (most likely) the electrical switch in the transfer
case. I didn't think it was serious enough to mess with unless I had to take
the t-case apart for some reason.

"RoyJ" > wrote in message
nk.net...

>
> You can check the operation by starting the beast up, pull the vac plug
> on the front axle and checking for a mild vac on one of the lines. Then
> shift to 4wd, the vac should switch to the other line. No vac on either
> says the line to the transfer case switch is bad. Not switching says the
> transfer case switch itself is bad. Vac on one direction, not the other
> says the vac harness is bad. Proper switching but no 4wd says the
> diaphram is bad or the shift dog is stuck.
>
> Snow wrote:
> > Where would I find the switch, I haven't looked yet, or is it quite easy
to
> > see?
> >
> > Snow...
> >
> > "RoyJ" > wrote in message
> > news > >
> >>Check the connection on the axle before pulling the dash off to get at
> >>the bulbs. Put it in 4wd, move forward and backward a few feet to help
> >>drop it in, see if the swich reads close to zero ohms. then see if the
> >>connector is any good.
> >>
> >>Snow wrote:
> >>
> >>>Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2
of
> >>>them slippery the other 2 were dry. I wasn't going fast and the 2
> >
> > corners
> >
> >>>that were dry I could feel the front wheels do the "hop" they do when
in
> >
> > 4wd
> >
> >>>on a dry surface. I used to park in an semi underground parking lot,
or
> >>>rather had to drive through one to get to my parking spot and needed
4wd
> >>>before I entered and after I exited to get into my spot (had turn a
> >
> > couple
> >
> >>>corners and the front would hop if it was in 4wd). I haven't checked
> >
> > the
> >
> >>>bulb yet, I'll do that tomorrow when I get home from work.
> >>>
> >>>Snow...
> >>>
> >>>"RoyJ" > wrote in message
> link.net...
> >>>
> >>>
> >>>>The older YJ's and XJ's had a vacumn switch sitting up on the
firewall,
> >>>>right next to the battery. Switch cuts in only after the front axle is
> >>>>locked. Newer models have the switch as an intergal part of the
diaphram
> >>>>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
> >>>>the XJ. You can easily check which you have: old units have 3 vac
ports
> >>>>on the axle, newer ones have 2 vac ports and a wire terminal.
> >>>>
> >>>>Did you actually get inot 4wd? Keep in mind that your transfer case
can
> >>>>switch into 4WD, your axle may not have made it. The light does not
come
> >>>>on until it is locked. Usual problem is bad vac harnes, next is the
vac
> >>>>switch on the tranny. Or just the usual assortment of bad wire, bunred
> >>>>out bulb. Harness runs about $35 at the dealer, switch is about $16.
> >>>>Lots of guys go with the manual cable, $200 as an accessory, less if
you
> >>>>make your own.
> >>>>
> >>>>Snow wrote:
> >>>>
> >>>>
> >>>>>Just wondering what turns on and off the 4wd part-time and full-time
> >>>
> >>>lights
> >>>
> >>>
> >>>>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
> >
> > indicator
> >
> >>>>>lights don't turn on. T-case still shifts and engages into both 4wd
> >>>
> >>>drive
> >>>
> >>>
> >>>>>settings, this morning a few local roads were just slippery enough to
> >>>
> >>>allow
> >>>
> >>>
> >>>>>me to shift into 4 high and try it. Does the light get turned on by
> >>>
> >>>the
> >>>
> >>>
> >>>>>same vac. switch as the t-case?
> >>>>>
> >>>>>Snow...93 XJ
> >>>>>
> >>>>>
> >>>
> >>>
> >>>
> >
> >

my 88 non disconnect has a switch in the tcase that makes the light work. It
also has a hard time in 4wd part time. full time works, low works but part
time 4wd is iffy for the light even though it shifts well.
KH

"Matt Macchiarolo" > wrote in message
...
> AFAIK there isn't a transfer case vacuum switch on the 93 XJ: that year
> there was no vacuum disconnect on the front axle.
>
> That said, the part-time light didn't work on my '93 XJ either, and I was
> able to determine that the bulb was fine...so it was either in the wiring
> to
> the transfer case or (most likely) the electrical switch in the transfer
> case. I didn't think it was serious enough to mess with unless I had to
> take
> the t-case apart for some reason.
>
> "RoyJ" > wrote in message
> nk.net...
>
>>
>> You can check the operation by starting the beast up, pull the vac plug
>> on the front axle and checking for a mild vac on one of the lines. Then
>> shift to 4wd, the vac should switch to the other line. No vac on either
>> says the line to the transfer case switch is bad. Not switching says the
>> transfer case switch itself is bad. Vac on one direction, not the other
>> says the vac harness is bad. Proper switching but no 4wd says the
>> diaphram is bad or the shift dog is stuck.
>>
>> Snow wrote:
>> > Where would I find the switch, I haven't looked yet, or is it quite
>> > easy
> to
>> > see?
>> >
>> > Snow...
>> >
>> > "RoyJ" > wrote in message
>> > news >> >
>> >>Check the connection on the axle before pulling the dash off to get at
>> >>the bulbs. Put it in 4wd, move forward and backward a few feet to help
>> >>drop it in, see if the swich reads close to zero ohms. then see if the
>> >>connector is any good.
>> >>
>> >>Snow wrote:
>> >>
>> >>>Yeah I'm pretty sure it went fully into 4 high, I turned 4 corners 2
> of
>> >>>them slippery the other 2 were dry. I wasn't going fast and the 2
>> >
>> > corners
>> >
>> >>>that were dry I could feel the front wheels do the "hop" they do when
> in
>> >
>> > 4wd
>> >
>> >>>on a dry surface. I used to park in an semi underground parking lot,
> or
>> >>>rather had to drive through one to get to my parking spot and needed
> 4wd
>> >>>before I entered and after I exited to get into my spot (had turn a
>> >
>> > couple
>> >
>> >>>corners and the front would hop if it was in 4wd). I haven't
>> >>>checked
>> >
>> > the
>> >
>> >>>bulb yet, I'll do that tomorrow when I get home from work.
>> >>>
>> >>>Snow...
>> >>>
>> >>>"RoyJ" > wrote in message
>> link.net...
>> >>>
>> >>>
>> >>>>The older YJ's and XJ's had a vacumn switch sitting up on the
> firewall,
>> >>>>right next to the battery. Switch cuts in only after the front axle
>> >>>>is
>> >>>>locked. Newer models have the switch as an intergal part of the
> diaphram
>> >>>>on the front axle. Cutover was '91 on the YJ, a year or so earlier on
>> >>>>the XJ. You can easily check which you have: old units have 3 vac
> ports
>> >>>>on the axle, newer ones have 2 vac ports and a wire terminal.
>> >>>>
>> >>>>Did you actually get inot 4wd? Keep in mind that your transfer case
> can
>> >>>>switch into 4WD, your axle may not have made it. The light does not
> come
>> >>>>on until it is locked. Usual problem is bad vac harnes, next is the
> vac
>> >>>>switch on the tranny. Or just the usual assortment of bad wire,
>> >>>>bunred
>> >>>>out bulb. Harness runs about $35 at the dealer, switch is about $16.
>> >>>>Lots of guys go with the manual cable, $200 as an accessory, less if
> you
>> >>>>make your own.
>> >>>>
>> >>>>Snow wrote:
>> >>>>
>> >>>>
>> >>>>>Just wondering what turns on and off the 4wd part-time and full-time
>> >>>
>> >>>lights
>> >>>
>> >>>
>> >>>>>on a 93 XJ (4.0, atw4 tranny)? I noticed last night that the
>> >
>> > indicator
>> >
>> >>>>>lights don't turn on. T-case still shifts and engages into both 4wd
>> >>>
>> >>>drive
>> >>>
>> >>>
>> >>>>>settings, this morning a few local roads were just slippery enough
>> >>>>>to
>> >>>
>> >>>allow
>> >>>
>> >>>
>> >>>>>me to shift into 4 high and try it. Does the light get turned on
>> >>>>>by
>> >>>
>> >>>the
>> >>>
>> >>>
>> >>>>>same vac. switch as the t-case?
>> >>>>>
>> >>>>>Snow...93 XJ
>> >>>>>
>> >>>>>
>> >>>
>> >>>
>> >>>
>> >
>> >
>
>