Electric troubleshooting
Thread Starter
5th Gear
Joined: Apr 2006
Posts: 5
Likes: 0
Electric troubleshooting
94 corvette ran fine, parked it gutted interior removed dash to clean and recarpet, put it back together and no crank no fuel pump, gauges don't move and the LCD screen is orange, also the info center and gauge park check gauges are on even with the key off
Drifting
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
Sounds like a bunch of different issues all at once.
No crank, no fuel pump, no LCD points to your CCM not being plugged in, or not receiving power. It's the little computer that mounts above the transmission tunnel on the driver's side. It's behind a flap in the carpet.
Any dash lights coming on with the key off sounds like you didn't wire the ignition switch correctly when you put it back together.
All in all, sounds like you didn't put it back together correctly.
No crank, no fuel pump, no LCD points to your CCM not being plugged in, or not receiving power. It's the little computer that mounts above the transmission tunnel on the driver's side. It's behind a flap in the carpet.
Any dash lights coming on with the key off sounds like you didn't wire the ignition switch correctly when you put it back together.
All in all, sounds like you didn't put it back together correctly.
Advanced
Joined: Jan 2020
Posts: 99
Likes: 21
From: Chelmsford, Mass
Disconnect the battery and Charge the battery and check battery voltage.
It sounds like you have a few problems.
Power going to gauges when key is off.
Other parts do not power on, when key is ON.
The Gauges on, when key is Off, sounds like a Missing Ground wire.
Start checking all of the Grounding points between the Dash and wiring harness.
Its most likely you missed a few re-connections or grounding straps.
I have never removed a c4 dash. Maybe some one else with first hand experience can jump in.
Do any lights work?
Check all of the cable connections between the dash and wiring harness.
Start checking fuses too.
After each debugging session, make sure you disconnect the battery each night.
It sounds like you have a few problems.
Power going to gauges when key is off.
Other parts do not power on, when key is ON.
The Gauges on, when key is Off, sounds like a Missing Ground wire.
Start checking all of the Grounding points between the Dash and wiring harness.
Its most likely you missed a few re-connections or grounding straps.
I have never removed a c4 dash. Maybe some one else with first hand experience can jump in.
Do any lights work?
Check all of the cable connections between the dash and wiring harness.
Start checking fuses too.
After each debugging session, make sure you disconnect the battery each night.
Thread Starter
5th Gear
Joined: Apr 2006
Posts: 5
Likes: 0
Thanks for replying guys, its a brand new battery, I checked all the fuses all good, cleaned all the connectors and relay plugs I did have the ccm out could that have shorted out. Not sure why the lights on the dash and gauge cluster would be on when key is off
Melting Slicks
Joined: Jul 1999
Posts: 3,214
Likes: 101
From: Decatur, Alabama
Sounds like a bunch of different issues all at once.
No crank, no fuel pump, no LCD points to your CCM not being plugged in, or not receiving power. It's the little computer that mounts above the transmission tunnel on the driver's side. It's behind a flap in the carpet.
Any dash lights coming on with the key off sounds like you didn't wire the ignition switch correctly when you put it back together.
All in all, sounds like you didn't put it back together correctly.
No crank, no fuel pump, no LCD points to your CCM not being plugged in, or not receiving power. It's the little computer that mounts above the transmission tunnel on the driver's side. It's behind a flap in the carpet.
Any dash lights coming on with the key off sounds like you didn't wire the ignition switch correctly when you put it back together.
All in all, sounds like you didn't put it back together correctly.
Thread Starter
5th Gear
Joined: Apr 2006
Posts: 5
Likes: 0
Ok making progress i had the two plugs on the passenger side under dash by the relays switched around now all seems good except it won't crank, and the gauge LCD screen just lights up orange, fuel pump kicks on i can start it by jumping the starter relay but shuts off
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Drifting
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
Big huge wiring mess indeed.
Advanced
Joined: Jan 2020
Posts: 99
Likes: 21
From: Chelmsford, Mass
Check your battery voltage daily just to make sure you are not discharging due to some stray short.
Read the threads about checking engine codes.
Keep good log notes.
Take it for a few short drives [Make sure you have someone to call to get you if you break down]
Read the threads about checking engine codes.
Keep good log notes.
Take it for a few short drives [Make sure you have someone to call to get you if you break down]