Today i decided to fix the illluminated key hole on the drivers door. Its been burnt out for some time so i went and bought a "grain of weat bulb".

With the outer door handle apart i also noticed the blue wire attached to the key cylinder was broken off. I believe this is for the alarm, and hence why my alarm was acting up. I mated and the tested the grain of wheat bulb with the stock courtesy key light wires and it illuminated just fine. Perfect....i figured id just solder everything up and id be good to go.

I tackled the the alarm wires first...there is a blue one and a black one. I re-soldered the blue one. Then i added to solder to the black wire, as it was starting to pull apart also. Doing this I joned (by mistake) the soldering spots of both wires. I heated it back up and seperated the two wires soldering spots...fixed.

I then took on the grain of wheat bulb...soldered up both wires. It alluminated fine then all of a sudden it went off.

When the door handle bulb went out, i also noticed the key ignition light was also out. So now my key door light is out, and my ignition light also. I believe these two key courtesy lights are conected someway....and heres why.

If i put a wire tester on the doors grain of wheat wires, the one wire lights up the tester real bright. If i put the tester on the other wire, the tester lights up dim BUT the IGNITION BULB COMES BACK ON (only with the tester touching though)!! I put the tester on the door key cylinder wires and it doesnt illuminate, but im not sure if it should.

Its not a fuse, well because i checked them, and also if one was burnt the tester would not come on at all. So i have no clue what i ahve done or whats going on.

please help.......

shawn

 

I did a search and it has come up as a common problem. Aparently its my CPU2... takes care of the alarm and courtsy lights etc.
How do i look into this or fix whats wrong in the CPU2?

I did find this link on the same problem, but i dont have the wiring diagram book. So I am a bit cofused as to what they are talking about.

My alarm still works, i was able to test that out, so the CPU2 is good on that. Do i have to buy a new CPU2 just so I can make the courtesy lights work again?!

 

That's really odd.

http://www.wankel.net/~krwright/file...ng_Diagram.pdf

There's the wiring diagram, you don't think it's a ground since when you touched it with the tester it came on?

 

If you read that link i put up, they say its Something to do wth the CPU2 not grounding. But the guy never came back with an answer to the post

Thanks for that diagram, but im lost looking at that lol

 

Oops..i thought i put up the link but i guess i forgot.

https://www.rx7club.com/showthread.p...highlight=cpu2

These guys are talking about it but there is no real answer, or maybe there is. Im just not to smert LOL

 

Go to page 92 in the diagram, you can follow the wires from the CPU2 to the ground points

113, 1S

 

I see 113 (1s)....now how do i follow that diagram? Its possible i shorted something out durring my soldering. But my alarm still works along with everything else the CPU runs, except the key illumination. Would there be some sort of a fuse in the CPU2? Or do i have to take it apart to see if something is burnt inside it.

From what i have been reading it has something to do with my ground and the CPU2. But figuring this out is confusing

 

Look at my picture.

 

Well i stuck the tester in the CPU2 main harness....top pin, second in from the left, grey/red wire. The tester glowed and the curtesy lights came ON. This means im not grounding out in my CPU2, id asume.

I tried taking the CPU2 apart, but its just a circuit board with solder spots. I cant pull the circuit board out to see the other side, where the little capacitors are and such.