Electrical Problem
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Instructor
Joined: Jan 2007
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From: Dennis from Hesperia Ca
Electrical Problem
The information keeps changing with the buttons on the right. Some times the display zero's out the average gas milage and goes to total mileage when I restart the engine. The radio also comes on when it was off when I turned the key off. When the turn signal is flashing sitting at a light I hear the fuel pump in sync with the turn signals.
It sounds like a ground problem to me. Has anybody experienced this?
It sounds like a ground problem to me. Has anybody experienced this?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
OK,,,,,, Electrical issues are sometimes very unique. But,, heres my best C5 Educated asscment :
When the battery is defective or severly aged,, cranking the engine can and will cause all the modules to reset to the default factory settings!!
You have several issues all at once.
1.As the car sits,, with the key on read the battery voltage reading at the DIC digital volt meter on the IPC. Use a digital Volt Meter and read the battery voltage directly on the battery terminals!
With the engine running,, read the battery voltage reading at the DIC digital volt meter on the IPC. Use a digital Volt Meter and read the battery voltage directly on the battery terminals!
POST the readings!
2. REMOVE the battery and have it fully tested at a local parts store.
3. Clean the battery cable terminals. Flush them out with brake parts cleaner and scrub with a wire brush.
4. When you reattach them to the battery, if you have a 97-03 C5,, TORQUE the terminals down to 11 ft/lbs.
5. With a known good battery, read the battery voltage reading at the DIC digital volt meter on the IPC with the key on and also engine running.
POST the readings!
Read and post your DTC. Clear them and see if any come back after ypu drive the car.
BC
When the battery is defective or severly aged,, cranking the engine can and will cause all the modules to reset to the default factory settings!!
You have several issues all at once.
1.As the car sits,, with the key on read the battery voltage reading at the DIC digital volt meter on the IPC. Use a digital Volt Meter and read the battery voltage directly on the battery terminals!
With the engine running,, read the battery voltage reading at the DIC digital volt meter on the IPC. Use a digital Volt Meter and read the battery voltage directly on the battery terminals!
POST the readings!
2. REMOVE the battery and have it fully tested at a local parts store.
3. Clean the battery cable terminals. Flush them out with brake parts cleaner and scrub with a wire brush.
4. When you reattach them to the battery, if you have a 97-03 C5,, TORQUE the terminals down to 11 ft/lbs.
5. With a known good battery, read the battery voltage reading at the DIC digital volt meter on the IPC with the key on and also engine running.
POST the readings!
Read and post your DTC. Clear them and see if any come back after ypu drive the car.
BC
Last edited by Bill Curlee; Nov 6, 2011 at 10:23 AM.
Thread Starter
Instructor
Joined: Jan 2007
Posts: 225
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From: Dennis from Hesperia Ca
The battery is only 2 years old, and had never gone dead. It could sit for 2 weeks and still starts right up. But like you said electrical problems could do strange things.
I haven't checked voltage readings or done any diagnoses yet. I was hoping for a common problem that I can go directly to. What you say about the modules resetting makes sense though. I'll start with voltage drops.
Thanks, Dennis
I haven't checked voltage readings or done any diagnoses yet. I was hoping for a common problem that I can go directly to. What you say about the modules resetting makes sense though. I'll start with voltage drops.
Thanks, Dennis
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Denis
There are TOOOOOOOOOO many variables to give you one "DO THIS" sumation... So,,,,,,,,,,,, providing the data, will help NARROW down the possibilities!
We will get it fixed,, NO DOUBT!
BC
There are TOOOOOOOOOO many variables to give you one "DO THIS" sumation... So,,,,,,,,,,,, providing the data, will help NARROW down the possibilities!
We will get it fixed,, NO DOUBT!
BC
