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XJ Ask the Question Thread
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
I know the HVAC is t4 neo wedge, I swear I read (and can't find it again) that the switches are either a t3 or t5 neo wedge. I pulled one and it just looks like a smaller one that went in the HVAC.
Yeah prime makes it nice if you can find them on Amazon. I bought some LED replacements for my floor lights in my 95 XJ from Amazon.
I have a 94 Cherokee. Does not have ABS. A couple months ago, I replaced calipers, pads, rotors, wheel cylinders, shoes, drums and bled the entire system. Brakes were working perfectly up until yesterday. Had a very stiff pedal and everything was fine. While I was driving, I hit the brakes and heard a pop that sounded like it came from behind the brake pedal. I stopped for gas, and when I went to take off, I put it in drive, and it was taking off in 3rd gear. If I manually shifted in to 1, it would drop down to 1st gear. I went about 2 blocks and went into the store. When I came back out, I went to take off, and my brake pedal was going to the floor. Pumping the brakes wouldn't make it any stiffer. I still have brakes, but only when the pedal bottoms out. When the vehicle is off, it has a stiff pedal, but if you hit and hold the pedal, as soon as you start the vehicle it drops to the floor. Seems like you can hear air escaping from the little cylinder beneath the brake pedal when you pump it. I drove it home very carefully, still having to shift the transmission manually. Someone suggested that this may be a vacuum issue, so I climbed under the truck and checked to see if there were any vacuum lines loose going to the transmission and there werent. Ran the car for a few seconds, then turned it off and pulled the rubber plug off the power booster and you could hear the vacuum release, but it wasn't very strong. It has now been suggested to me that it may have blown a seal in the power booster...does this sound about right to you? I need to add that there are no fluid leaks, and that this morning, it was much cooler outside, and the transmission was working fine...i am baffled.
That sounds like it might be right. A buddy of mine replaced his. If I can get a hold of him, I can get you the bulb type.
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
hey guys,
need some advice. 2001 xj getting the follwing codes,
po123: idle position sensor high voltage, po505: idle air control motor circuit shorted, P0130: upstream O2 sensor heater relay circuit fault, PO136: downstream 02 sensor heater relay circuit fault, P1491: radiator fan relay circuit open or short, P1596 speed control switch always high.
airbag light coming on intermittently. running ok other than a bucking/misfire when accelerating.
where should i start in troubleshooting.
thanks
need some advice. 2001 xj getting the follwing codes,
po123: idle position sensor high voltage, po505: idle air control motor circuit shorted, P0130: upstream O2 sensor heater relay circuit fault, PO136: downstream 02 sensor heater relay circuit fault, P1491: radiator fan relay circuit open or short, P1596 speed control switch always high.
airbag light coming on intermittently. running ok other than a bucking/misfire when accelerating.
where should i start in troubleshooting.
thanks
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Here's the typical I have a noise what is it question? Jeep is going into a tranny shop for diagnostic, hoping you guys could help me out with a little knowledge ammo before I go. Problem - seems like there is a slipping type noise coming from the tranny when cold. Shifts perfect always. When it gets hot, around 10 or 15 miles of driving, the noise turns into a MUCH louder grinding sound, and a very loud clunking develops, especially while turning. Although the clunking sound seems like its coming from the rear, the loud grinding I can't pinpoint from the tranny or rear. Again, only when hot, never does it when cold or quick trips around our little town. From due dilegence in searching forums, I can only guess tranny, transfer case, u-joints on rear drive line or Diff problems. Anyone have this type of problem? 92 cherokee, AW4, chrysler 8.25 rear. 4 inch lift. No SYE
Lets see... just replaced diff fluid front and rear, everything looked good. New tranny filter, gasket and fluid, clean with no signs of metal shavings. New front wheel u-joints. New fluid in transfer case, old was pretty dark. 175,000 miles. Thanks for any ideas!
Lets see... just replaced diff fluid front and rear, everything looked good. New tranny filter, gasket and fluid, clean with no signs of metal shavings. New front wheel u-joints. New fluid in transfer case, old was pretty dark. 175,000 miles. Thanks for any ideas!
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Yesterday I replaced the thermostat with an OEM. Went for the same trail ride this afternoon. I didn't get as hot but I did get hot. (According to my Ultra Gauage). My dash gauge showed 210 most of the time. They when I started up the dirt road, climbing but not hard, the dash gauge climbed to the next tic after 210. No where near overheating. While I was 1 tic over 210 on the dash gauge, my Ultra Gauge go to 238 degrees. I presume it reads from the same sensor and the dash gauge. How hot is to hot? Any where does your cherokee run on the dash gauge when out on the trail. Thanks, RSWiser
Find out Saturday when I go for a trail ride if this did the trick.
RSWiser
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Have flame ready just in case but I did mines with a day of PB prep and my battery impact gun. Lil tight, lil loose and repeat until it comes up




