What could this be?

Reply Subscribe

Thread Tools

Search this Thread

Jan 13, 2016 | 10:46 PM

08 pimpala ss

Thread Starter

TECH Enthusiast

Joined: Dec 2012

Posts: 696

Likes: 0

From: WEST PALM BEACH FL

What could this be?

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

Jan 13, 2016 | 11:26 PM

spawne32

TECH Fanatic

iTrader: (2)

Joined: Jan 2014

Posts: 1,524

Likes: 4

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.

Jan 14, 2016 | 06:51 AM

rottonj

TECH Fanatic

iTrader: (4)

Joined: Jul 2008

Posts: 1,403

Likes: 7

From: Connecticut

Quote:

Originally Posted by 08 pimpala ss

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

Jan 14, 2016 | 02:20 PM

Grand Prix GXP

Teching In

Joined: May 2014

Posts: 13

Likes: 1

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.

http://www.amazon.com/Dorman-970-042-ABS-Sensor-Harness/dp/B002XYN8AA/ref=au_as_r?_encoding=UTF8&Make=Pontiac%7C52&Model=Grand%20Prix%7C598&Year=2004%7C2004&ie=UTF8&n=15684181&s=automotive&vehicleId=2&vehicleType=automotive

Jan 14, 2016 | 02:39 PM

91parkave

Moderator

iTrader: (4)

Joined: Feb 2008

Posts: 2,079

Likes: 9

From: Arizona

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.

Jan 14, 2016 | 07:35 PM

Sint3k

TECH Fanatic

Joined: Jun 2007

Posts: 1,316

Likes: 3

From: Dolla$ , TX

Quote:

Originally Posted by 08 pimpala ss

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

Jan 15, 2016 | 10:05 AM

Pauls325

TECH Resident

iTrader: (1)

Joined: May 2008

Posts: 800

Likes: 1

From: Minnetonka,MN or Fargo

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

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Jan 15, 2016 | 02:52 PM

08 pimpala ss

Thread Starter

TECH Enthusiast

Joined: Dec 2012

Posts: 696

Likes: 0

From: WEST PALM BEACH FL

Quote:

Originally Posted by Pauls325

•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

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