1999 Jeep Wrangler No Heat

THE PCM MODULE.
no country stated, the 728ad shows Europe. (why?)
"I found"

where, at ebay, at pick-apart, or ?
USA cars have 11 PCM for one engine. fact.
and 100s more world wide.
what a question, just a p/n
then you post to grand Cherokee and then text leaving out Grand.?
why?
i searched the part at jeep and is wrangle part, 629ad.

you do know that it must be reprogrammed to your car right:?
the pcms on cars can vary
by engine, trans opted , 4wd/2wd,and year.
federal PCM
Calif PCM
and mexico PCM
and 9 more. just for 1999

is yours 42RE for 45RFE?? tranny??? 30/32 RH? what?
post county (or state if calif)
post engine and year
post body and not contradict.?
post drive line, in car, tranny and if 4wd?
then we can match it up
or call jeep.com

they (jeep) will do this magical thing!
ask you the VIN.
and then look it up in their database.
and see ALL THE ABOVE even what radio is in it. of 5.
me, im a glass half full guy (hard knocks, reality stuff)
id not even believe the part in car is correct.
im too SAVVY !
i find out from jeep what it should have first.

not one matches the 4.0L in the GC.


the 629 posted shows this at jeep.com

JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 3-Spd. Automatic 30RH 1998
JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 5-Speed Manual 1998
JEEP WRANGLER 4.0L I6 Power Tech, 3-Spd. Automatic 32RH 1998
JEEP WRANGLER 4.0L I6 Power Tech, 5-Speed Manual 1998
(if true needs to be programmed to each)

the send number
56041 278AD

lands at.
(part not found, is this a non usa part?) im stumped

was fun to try.
but im stumped.

why are you replacing the bellhousing?,it means you are going to have to pull out the motor or the gearbox/transfer case,whichever is easieast

cheak all of your spark plugs. one might not be fully connected, you may need a tune up if thats not the probelem. your timing may be off. i hope this information helped. Be careful and drive safe!

If your heat is hot your system is ok if it is not hot usually a thermistat or lack of coolent is the problem. 4 cyl engines do take a littlte while to heat up. a solution to this problem that I use is to purshase a remote starter its good for the engine and cold morningr about 15 minutes before I leave I start it leaveing the heat on high and blower on full ,its toasty by the time I get in.

With the Jeep in park, move the left shifter to 4 wheel drive. Proceed to put right shifter into drive, proceed to drive. Only use 4wheel drive when neccessary...ie...snow, mud, use 4 wheel lo in steep incline or when really bogged down.

Hope this helps

This is 100% the Blower (Fan) Motor Resistor located near the Blower Motor.
This is a very common problem with Chyrsler, Dodge, Jeep and Plymouth. The key symptom is the Fan only working on High.
This is very easy to access and replace.

Let me know if this helped....

it is in the tranfer case because you can't get it in 4x4 at all
now if it went in 4x4 drive and the front wheels don't engauge its the front end

IS YOUR 4X4 ACTUALLY ENGAGING, IF SO THEN THE BULB BEHIND CLUSTER IS MOST LIKELY BURNED OUT

Tell the guy who fitted your radiator to finish the job, your cooling system needs bleeding

check the ground wirea at the dipstick tube,remove them all,and bend the ends of the wire,look for weak or broken wires, i bought several 4 cyl jeep that had problems at shift, fall on their face < after the engine settled back in to place,so wires made contact> just a thot. the ground wires are small the engine moves,when shifting.