Did you get the schematis? Heres the inside of a failed Ignition switch:

http://forums.corvetteforum.com/show....php?t=1951626

Bill

 

Yes, I got the email. Thank you again for all your help here. The car didnt act up this morning on my way into work so I am just waiting to test it out.

 

I have a 87 that sat for 5 years. I am having a problem with the instrument panel loosing brightness and dimming. Any help appreciated.

 

This is an update for anyone that uses the search function in the future and finds these helpful.

I finally think I solved all the problems (fingers crossed). The low voltage issue I think was a ground. After I cleaned and tightened grounds that went away. I was left with the High Voltage issue on the DIC though. Turns out my IPC was going bad. I found someone selling the bits of a old IPC on the auction site and bought them. The main thing I wanted was the circuit board that goes in the IPC. I installed it in the car and the voltage issue was gone, but the mileage on it was about 60k less than my car had on it. Not wanting to pay some $300 to get it reset, I started looking for a used IPC with closer to my mileage on it. As luck would have it I found one that had about 1k more miles on it. I bought it and installed it last night. Through my last night test drive and driving around today I am proud to announce no more electrical issues!!

I even figured out what was causing the slow drain on my battery in the process. It was the monitor for my carPC. For now I just installed a on/off switch so if I am parking the car for a couple days I can turn it off. With the monitor and PC completely off the car draws 25ma.

 

You should post this question in the C4 forums .... you're in the C5 forum .... your instrument panel is totally different from ours .... there are some good folks that can help you out there ......

 

I had an 85. I PM,ed you on some suggestions!

BC

 

Excellent, thanks a bunch for being one of the few who actually come back and update the thread when the problem is solved!

 

My 99 goes crazy some times too. it will dim the lights and show low charge then go back to working fine. Normay it is chargin at 13.9V what may be causing that? new battery and I have looked at all the connections listed here.