96 Grand Cherokee Dash problem

Bump

I should have time today to do this.

Air bag controller no.  It will only be receiving data, not controlling data.  Possibly the power train control module though.  From my understanding you have only replaced the body control module?

Quote: Originally posted by PLAYER69 on February 03, 2003

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Air bag controller no.  It will only be receiving data, not controlling data.  Possibly the power train control module though.  From my understanding you have only replaced the body control module?

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the body control module and the IC was replaced.n I was told that they have to be matching to keep the milage right or something.

and while it(the IC) was not working, I COULD read the data with the scann tool.

Well, it`s back! :( It was great untill, they claim, it rains or snows, or they go thru the car wash. I hosed the whole under hood area this morning with a spray\mist bottle and tugged on all the harnesses with out getting the dash to fail at all. Does the fact it seems to be water related help at all?

Well, I splashed through a couple puddles and got it to fail. I have it in the garage now and the dash will constantly turn on and off. resetting everytime it does. The compass in the overhead resets with the dash. I have the dash out, and the compass down and there is a constant 12v + and ground at both the dash connector and the compass connector. I see no reason for it to be constantly turning on and off. The compass will reset with the dash unplugged. Is there a relay that controls both?? Or any ideas at all??

This is strange! The cycling of the dash and compass is also tied to the door chime, when the dash resets the door chime starts over. I can unplug evey single fuse and relay in both the fuse box inside the right kick pannel and the fuse box under the hood and the dash still continues to turn on and off. I can unplug the engine controler with the same results. When the dash goes out, my snap on scanner still sees all the info with no interuption. I can see nothing in the scanner that appears to be switching with the cycle of the dash. The compass does not go off every time the dash does, but the dash does go off every time the compass does. Sometimes it seems if I turn off the key the dash will stay lit up longer then it should, maybe 2 secs after the key is off before the lights go out, but the motor does shut off with the key. Is there anyway to test the BUSS system as I have 12v keyed and aways on power with ground to the back of the dash, it almost has to be the BUSS system, doesn`t it?? The two BUSS wires also go up to the compass as well. I seem to have continuity between all the BUSS wires.

Found it!! Orange wire going to the body controler is suppost to have keyed on and start power, it had neather. I tryed to pull the body modual`s black plug apart (wrong move) and it fell apart. I got one out of a salvage yard and before I soldered the connections I dissconnected one wire at a time till I found the orange wire made it stop cycling on and off. I got a factory wiring harness chart and found the orange wire was the keyed on and start wire from the under hood fuse box. I ran a new wire from the body modual to the under hood fuse box right to the back of the fuse it was suppose to go to, and now it works perfect, no more dash going out when spashing thru the puddles or going thru the car wash! :p Thanks to all who responded and just make a mental note in case you run into a Grand Cherokee that loses the dash funtion when it gets wet.