ABS Light Coming on, Pulse Noise

Reply Subscribe

Thread Tools

Search this Thread

09-09-2010 | 05:43 PM

91CherokeeWhiteLimited

Thread Starter

Newbie

Joined: Aug 2009

Posts: 11

Likes: 0

Model: Cherokee

ABS Light Coming on, Pulse Noise

I got a 91 Jeep Cherokee Limited with 230k on it and the ABS light is coming on when I start the car. Also I can hear a pulse noise coming from the area near the blower motor ( which the blower motor is located under the dash on the passengers side ). The pulse noise is all the time, after starting the jeep. The brakes work just fine, but I'm sure I have lost the anti lock feature now ( I'm guessing this ). So does anybody know the cost I'm looking at ? I don't do brakes period, especially ABS system !

Reply Like

09-09-2010 | 06:14 PM

00XJ49

Junior Member

Joined: Sep 2010

Posts: 40

Likes: 0

From: Indiana

Year: 2000

Model: Cherokee

Engine: 4.0L I6

Any vibration on the brake pedal?

Are you sure the ABS light and the pulsing are related? Maybe the light is staying on just to let you know it's not working (for whatever reason), and something else is causing the pulsing.

Quote:

The brakes work just fine...

I'd think if the ABS was triggering erroneously, it'd be a heck of a drive...

Quote:

Also I can hear a pulse noise coming from the area near the blower motor...

...plus, the MC's behind the steering wheel...

Reply Like

09-09-2010 | 06:26 PM

91CherokeeWhiteLimited

Thread Starter

Newbie

Joined: Aug 2009

Posts: 11

Likes: 0

Model: Cherokee

ABS Light and Pulse Noise

I'm sure the pulse noise ( which I said before is now all the time once I start the jeep ) is related to the ABS system. When the " Check ABS" light came on is when the pulse noise started and never stopped since then. So each time I start the jeep the "check ABS" light comes on and the pulse noise starts. No strange brake vibrations .

Reply Like

09-09-2010 | 06:51 PM

Red91XJ

Junior Member

Joined: Jul 2010

Posts: 73

Likes: 0

From: Illinois

Year: 1991

Model: Cherokee

Engine: 4.0L I6

From what you described, the noise is coming from the general direction of where the ABS pump/motor assembly is located (toward pass side). In 1996 a recall was issued that covers your model year Cherokee for lifetime replacement of the ABS pump/motor assembly and/or actuator:

Recall Date:
DEC 27, 1996

Model Affected:
1991 JEEP CHEROKEE

Summary:
VEHICLE DESCRIPTION: VEHICLES EQUIPPED WITH ANTILOCK BRAKE SYSTEM (ABS). THE ANTILOCK BRAKE SYSTEM (ABS) HYDRAULIC CONTROL UNIT CAN EXPERIENCE EXCESSIVE BRAKE ACTUATOR PISTON SEAL WEAR WHICH COULD CAUSE PUMP-MOTOR DETERIORATION.

Consequence:
IF THIS OCCURS, THE ABS FUNCTION WOULD BE LOSE AND REDUCED POWER ASSIST WOULD BE EXPERIENCED DURING VEHICLE BRAKING. THE INSTRUMENT PANEL WARNING LIGHTS WILL SIGNAL SYSTEM IMPAIRMENT AND THE BASE MANUAL BRAKES WILL REMAIN FUNCTIONAL.

Remedy:
DEALERS WILL TEST THE VEHICLE'S ABS AND REPAIR AS NECESSARY. THE WARRANTY ON ALL ABS COMPONENTS WILL BE EXTENDED TO 10 YEARS OR 100,000 MILES (EXCEPT FOR THE BRAKE ACTUATOR PISTON ASSEMBLY AND THE PUMP-MOTOR ASSEMBLY WHICH WILL HAVE A LIFETIME COVERAGE). OWNERS WILL BE REIMBURSED FOR PREVIOUS ABS COMPONENT REPAIR COSTS.

Potential Units Affected:
52000

Notes:
CHRYSLER CORPORATION 702

Read more: http://www.motortrend.com/cars/1991/...#ixzz0z4k6UlHk

You should see if this is the source of your problem first...since it is a free fix! You can check to see if you have any open recalls at jeep.com and search by VIN.

Last edited by Red91XJ; 09-09-2010 at 07:05 PM.