Electrical issue on 03 suburban?
Here is my problem. I have an ’03′ Surburban with 65,000 miles on it. I have an intermitten problem when I hit a bump it seems like my vehicle shuts off and turns on momentarily. Sometimes the door locks just cycle and sometimes the check engine light goes on and off, ABS light comes on and off, brake warning light goes on and off, service brake system flashes across my odometer and chimeing like I just started the vehicle. I also lose power for a second. Sometimes the ABS light and brake warning light stays on. My brakes work fine and the brake warning light goes out when I shut off and restart the vehicle, then after running awhile the ABS clears. At least till I hit another bump. Any thoughts where to start? It seems to be a loose electrical connection. Checked ths grounds off of the engine and it isn’t loose. I also had the seat heaters on when it did this and they turned off. No OBD codes
3 Responses
dewitt3333
10 Feb 2010
andy
10 Feb 2010
Check your main grounds ( battery to body and baterry to engine) then check the connector on your PCM to make sure it is not getting loose and also check the bulk head connector ( main wire harness connector on the firewall) A loose connection in any one of these will cause the problems your having Good Luck
wildmanny2
10 Feb 2010
The underhood fuse container is where it starts from.It might be helpful to start the engine then rap and wiggle the box.I had this happen on another vehicle,the wire leading from the battery to the underhood distribution container was not tightened at the box.
A lot of the instrument lights go goofy when the car has a bad ground. If you battery is loose in the battery holder because the strap is missing, the battery may be jumping around and pulling on the cable. Strap it down and check your battery connections.