ABS light comes on

Reply Subscribe

Thread Tools

Search this Thread

May 4, 2011 | 07:39 PM

lspall

Thread Starter

New User

Joined: Dec 2006

Posts: 22

Likes: 0

ABS light comes on

Symptoms -
1. Turn the key to "on" position all warning lights come on then go out including the ABS light.
2. Start the engine all warning lights come on then go out including the ABS light.
3. Shift into gear no warning lights.
4. Start driving, after about 20 to 30 feet ABS light comes on.

Any ideas ?

May 5, 2011 | 07:47 AM

c_hohensee

Laughing Gas

Joined: Feb 2006

Posts: 843

Likes: 0

What vehicle and year? The most common cause is the rear speed sensor on the rear differential depending on the vehicle.

May 5, 2011 | 09:24 AM

lspall

Thread Starter

New User

Joined: Dec 2006

Posts: 22

Likes: 0

2002 Expedition XLT 4x4 w/5.4 engine

May 5, 2011 | 11:43 AM

pdqford

Logistics Pro

Joined: Jan 2001

Posts: 3,740

Likes: 37

From: Central NYS

I'd look for a scan tool (or someone) able to read ABS codes.

May 6, 2011 | 08:04 AM

c_hohensee

Laughing Gas

Joined: Feb 2006

Posts: 843

Likes: 0

Quote:

Originally Posted by pdqford

I'd look for a scan tool (or someone) able to read ABS codes.

I agree with that, but at <$20 the rear sensor is a good bet if you need to pay to have it scanned.

May 11, 2011 | 12:22 PM

r2millers

Postmaster

Joined: Sep 2010

Posts: 3,472

Likes: 2

From: Southern Cal

will the typicasl scanner detect abs issues? i thought it was a completely different detection system.

May 11, 2011 | 04:38 PM

alloro

Fleet Owner

Joined: Apr 2008

Posts: 24,316

Likes: 5,127

From: 0,0,1

You need an ABS code scanner. The one that scans engine codes will not work.

Trending Topics

1995 Ford F150 Centurion 4x2 value

33

589
Did dealer screw up my order??!!! - "91G" question

31

754
This is prolly a 1 page thread at most

110.2k

6M
A few things chevys got right

25

1.1k
1989 7.3 replacement starter

22

200

May 16, 2011 | 02:33 PM

lspall

Thread Starter

New User

Joined: Dec 2006

Posts: 22

Likes: 0

SOLVED !!!!!!

Found a place that would do the ABS scan for free, the scan revealed that the passenger front ABS sensor was giving an erratic reading. Since I didn't have the $150 for a new sensor I did a little troubleshooting and found the cause of the problem. Suspecting a broken wire I took the sensor off and cleaned it up, I then put my ohm meter on it (putting each test lead on each prong of the connector) and got a ohm reading of 425 ohms. Not knowing what the range should be, I held the the test leads on the prongs and had the wife bend different sections of the wire. Then SURPRISE !!, found a section that would read anywhere from 0 to 1500 ohms depending on which way the wife bent or rotated that section of wire. So knowing what section was damaged I put the sensor back on the Expedition and positioned that section of wire as straight as possible then went for a test drive. NO LIGHT CAME ON YAAAAAY !!!!