Dash does not light up
Thread Starter
Intermediate
Joined: Apr 2018
Posts: 27
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Dash does not light up
I have a 1985 c4 corvette and when i try to start it thendash doesnt work and so the car doesnt start. I changed out the ECM and now i get a brake light and a door light. All interior lights work, wipers work, lights work, un lock and lock, powered windows work, driver seat works. Right now idk what to do to fix it.
Racer
Joined: Apr 2018
Posts: 349
Likes: 55
I have a 1985 c4 corvette and when i try to start it thendash doesnt work and so the car doesnt start. I changed out the ECM and now i get a brake light and a door light. All interior lights work, wipers work, lights work, un lock and lock, powered windows work, driver seat works. Right now idk what to do to fix it.
Per the manual, test voltage at Pin D5 for the dash connector. This should be battery voltage. Pin D16 and C16 should be 0. Key on, all three should be battery voltage. If one of them aren't, the issue is in that circuit and not the dash. If they are all good, GM says replace the dash. The LCD fuse, cluster fuse, and Tail fuse, and INST fuse block all part of the dash circuit, in some capacity.
That should help you diagnose the dash. Check the fuses first, then the dash connector.
