08 pimpala ss

I'm getting abs and Trac lights on and off when I hit any type of bump sometimes they will stay on for a sec and also at times I get brake light. Wheel sensors are all new. I get a code u100 lost communication with abs module. Any ideas would be awesome

spawne32

iTrader: (2)

if your confident of the condition of the harness, id suspect the ABS module itself on the front of the ABS pump. Broken contacts inside the module at the power connection are a pretty common failure.

rottonj

iTrader: (4)

Have the ABS module rebuilt, lots of companies out there that do it. Some really inexpensive on eBay. I have no experience with any of it so use at your own risk. Post back how this was resolved. Thanks

Grand Prix GXP

This sounds like what happened to my 2004 GP. I ended up replacing both the driver's and passenger's side ABS wiring harnesses. Here's the part I used, if the link doesn't work it's a Dorman part # 970-042, I bought them from Amazon.

91parkave

iTrader: (4)

Pull the abs module plug, take a dental pick an pick at the terminals some of them can get loose inside of the plug itself.

Sint3k

Do the door locks or anything cycle when this happens ? Or the dash flash off and on ?

Pauls325

iTrader: (1)

check the brake apply sensor i had an intermittent issue where my abs traction and stm lights would come on.... that was the culprit
also check any mechanical connections to the abs module if you haven't already

Pauls325

iTrader: (1)

•DTC U0100 Lost Communication With Engine Control Module (ECM)
is this the code you are receiving?
or is it dtc U1000

i can help if we get the code right

08 pimpala ss

Yes that exact code and the other night it hit some hard rain and all the gauges droped several times I got home and parked asap

08 pimpala ss

Sorry I was wrong it's

Sint3k

Seems similiar to the issue when my car was grounding out to the starter positive from the engine movement touching the metal intake housing

Pauls325

iTrader: (1)

check to see that the rubber seals in the connectors look alright water getting into connectors can cause all kinds of havok

08 pimpala ss

The connector looks good i have checked it multiple times. I think it could be voltage something to do with my aftermarket alternator