ABS light on after a bump

My ABS light comes on while going down the road and hitting a bump. It does not happen all the time, you stop turn the motor off and it will be off for awhile hit another bump and it is back on. Any help ?????

I would check your speed sensor connections at the hubs. They may be loose enough that a bump allows the circuit to open, but then come back into contact. It's enough to trip a fault, but since they come back into contact it works again when the next diagnostic test is ran when you turn the car on.

My ABS light comes on while going down the road and hitting a bump. It does not happen all the time, you stop turn the motor off and it will be off for awhile hit another bump and it is back on. Any help ?????

You might also want to check the conection under the Passenger seat. My light had come on for no apparent reason. Read here in the forums that this might be the area of concern. I unplugged, checked for any possible corrosion and replugged. Never came back.

Good luck.

You might also want to check the conection under the Passenger seat. My light had come on for no apparent reason. Read here in the forums that this might be the area of concern. I unplugged, checked for any possible corrosion and replugged. Never came back.Why would there be any connector under the passenger seat? Are you possibly confusing ABS with airbags?

Why would there be any connector under the passenger seat? Are you possibly confusing ABS with airbags?

There is a connector next to the fuel connector under the Driver side. I had the same problem. Both the multi pin fuel connector and the 3 pin connector had corrossion.
The ABS light would come on intermitt when the 3 pin connector would not make good connection.


Donnie Lee

Why would there be any connector under the passenger seat? Are you possibly confusing ABS with airbags?

I totally misread this thread. It was AIRBAG, not ABS :banghead:

Sorry for the bad info and thanks for the correction!

Same thing happened to me, called the chevy dealer and they said to check the connections under the van. There are wires leaving each rear hub, these wires then trace towards the front of the vehicle, about 2-3 feet from the hub they connect route thru a connector. this is were my problem laid. Hooked it back up and the problem was fixed. I spent a lot of time removing the rear wheel and tracing the wires checking for broken wires etc, then spent about 20 seconds putting the connection back together that I should have looked for in the first place. this may not be your problem but it seems to be the same circumstances. good luck.