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1986 C4 Digital Dash Problem

clberger

Member
Joined
Aug 18, 2013
Messages
5
Location
Woodstock, NY
Corvette
1986 Roadster
Hello, so here is the problem. All of a sudden my entire digital dash goes off & on. When it comes back on it is resetting and all stored data is lost. It can stay off for as little as a couple seconds up to an hour.

I noticed that when it comes back on the Volt gauge has a red warning light and is reading between 16 to 18 volts. Silly me, I think its the voltage regulator so I run out and replace the alternator. Needless to say, that didn't work. After that I have the brainstorm that maybe I should check the voltage at the battery. The volt guage is showing 18 volts but when I put a meter on the battery, it is showing the normal 13 volts (yes, I had the car running).

So, if anybody has any idea's, I'd be glad to listen.

Thanks, Craig
 
The first thing that pops to my mind (non-C4 owner) is ground straps... With a slopped connection, you will get strong voltage on the supply side but intermittent issues like you describe.

Mac
 
Moving from the New Member Introductions forum to the C4 Tech forum....
 
The first thing that pops to my mind (non-C4 owner) is ground straps... With a slopped connection, you will get strong voltage on the supply side but intermittent issues like you describe.

Mac

Welcome to CAC :beer

Just what Mac said...especially G101 which is on the passengers kick panel side :thumb
 
The first thing that pops to my mind (non-C4 owner) is ground straps... With a slopped connection, you will get strong voltage on the supply side but intermittent issues like you describe.


Thanks, I will take a look and see what I can find. Craig
 
Cluster

Don't waste your time on chasing grounds & other stuff. Your cluster needs repair & has one or more bad IC's. The voltage is the clue.
 
Don't waste your time on chasing grounds & other stuff. Your cluster needs repair & has one or more bad IC's. The voltage is the clue.

Thanks Ken, I sort of was thinking that but I didn't want to come to the realization of what it was going to cost!
Craig
 

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