Multiple warning lights - advice please!
Melting Slicks
Joined: Nov 2005
Posts: 2,074
Likes: 309
I had a C5 with multiple warning lights and the problem was a connector that hadn't seated properly after a clutch change. Unfortunately, there are lots of connectors on these cars and can be hard to find.
Melting Slicks
Joined: Nov 2005
Posts: 2,074
Likes: 309
I had a C5 with multiple warning lights and the problem was a connector that hadn't seated properly after a clutch change. Unfortunately, there are lots of connectors on these cars and can be hard to find.
Safety Car
Joined: Jun 2003
Posts: 4,250
Likes: 656
From: San Diego Ca
I have quit putting headers on cars. It isn't even the obvious....bad ground due to install, or burned wires, but the non obvious. Slow cooked wiring harness due to proximity to the headers. Had that problem multiple times on my LS2 402 track car until I rewired the entire harness back to the firewall, then down and to the 3 places the harness wanted to go.
However I was able to chase it as I could see I wasn't getting the reference 5 V I needed at the knock sensor and the codes led me to that diagnosis. And chasing down that circuit led me to problems in 2 other circuits in the same wire bundle running within 2 inches of the headers in their stock placement. Unfortunately the cars are getting so complicated with so many computers that it is harder to diagnose electrical issues particularly intermittent ones.
However I was able to chase it as I could see I wasn't getting the reference 5 V I needed at the knock sensor and the codes led me to that diagnosis. And chasing down that circuit led me to problems in 2 other circuits in the same wire bundle running within 2 inches of the headers in their stock placement. Unfortunately the cars are getting so complicated with so many computers that it is harder to diagnose electrical issues particularly intermittent ones.
Race Director
Joined: Jan 2005
Posts: 13,934
Likes: 4,257
From: NC
I would be surprised if he can Lemon Law the car since it is modified.
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
I have quit putting headers on cars. It isn't even the obvious....bad ground due to install, or burned wires, but the non obvious. Slow cooked wiring harness due to proximity to the headers. Had that problem multiple times on my LS2 402 track car until I rewired the entire harness back to the firewall, then down and to the 3 places the harness wanted to go.
However I was able to chase it as I could see I wasn't getting the reference 5 V I needed at the knock sensor and the codes led me to that diagnosis. And chasing down that circuit led me to problems in 2 other circuits in the same wire bundle running within 2 inches of the headers in their stock placement. Unfortunately the cars are getting so complicated with so many computers that it is harder to diagnose electrical issues particularly intermittent ones.
However I was able to chase it as I could see I wasn't getting the reference 5 V I needed at the knock sensor and the codes led me to that diagnosis. And chasing down that circuit led me to problems in 2 other circuits in the same wire bundle running within 2 inches of the headers in their stock placement. Unfortunately the cars are getting so complicated with so many computers that it is harder to diagnose electrical issues particularly intermittent ones.
1st Gear
Joined: May 2020
Posts: 1
Likes: 0
From: Uae
Camaro zl1 lt4
This just started last night for the first time since I've had the car. Any positive advice would be appreciated.
During a normal drive, after 5 minutes or so at a regular speed, the stability control light would flash on a few times then all the following warning lights would come on solid:
Stability Control
ABS
Parking Brake
Electric Parking Brake Light
"Service Rear Axle"
"Service Suspension"
Also the rear camera and cruise control would no longer function.
I could stop the car, turn it off, turn it back on, and everything would go away on and look normal on the dash. After a short time driving it, they would all come back on
So this morning I disconnected the negative lead to the battery for about 10 minutes, and while it was disconnected I tightened every battery connection I could see. I then reconnected the negative terminal and took it for a test drive. It happened again within 5 minutes. So I started doing some testing to see what conditions caused the problem. I discovered that if I jerked the steering wheel to the left nothing happened. But if I jerked it to the right the stability control light and service rear axle would flash on then back off. Once it happened 3 times though then all the lights would come on again and do everything I described above. This happened regardless of the speed I was going.
So any advice would be greatly appreciated!
During a normal drive, after 5 minutes or so at a regular speed, the stability control light would flash on a few times then all the following warning lights would come on solid:
Stability Control
ABS
Parking Brake
Electric Parking Brake Light
"Service Rear Axle"
"Service Suspension"
Also the rear camera and cruise control would no longer function.
I could stop the car, turn it off, turn it back on, and everything would go away on and look normal on the dash. After a short time driving it, they would all come back on
So this morning I disconnected the negative lead to the battery for about 10 minutes, and while it was disconnected I tightened every battery connection I could see. I then reconnected the negative terminal and took it for a test drive. It happened again within 5 minutes. So I started doing some testing to see what conditions caused the problem. I discovered that if I jerked the steering wheel to the left nothing happened. But if I jerked it to the right the stability control light and service rear axle would flash on then back off. Once it happened 3 times though then all the lights would come on again and do everything I described above. This happened regardless of the speed I was going.
So any advice would be greatly appreciated!
Burning Brakes
Joined: Oct 2001
Posts: 885
Likes: 15
From: South Florida
