93 mark viii abs issue

[93luxurysnake]

my 93 mark viii is having a major issue with the abs an traction control when you start the car everything is good even rolling around the yard is ok but soon as you get above 20 mph it shuts the abs an traction control off until you shut the car down an start it back up i really need help with this if anybody has any idea what it is PLEASE HELP!!!!!!!!

 

[driller]

Sounds like a wheel sensor is not working.

 

[chris2523]

check the abs codes.
wheel speed sensor maybe, but my problem was a bad pump.
the abs system checks the pumps ability to make pressure when you hit 20 mph. if it fails, the light comes on.

 

[billcu]

You're lucky, since your car is a 93 and has OBD1, you can easily pull the ABS codes yourself with a piece of wire.

The Anti lock test connector is located inside the headlight access door on the passenger side. It's in a red plastic holder. Push it out of the holder and hold it facing you with 2 terminals on top, and 4 on the bottom. They would be numbered 1, 2, then 3,4,5,6 on the bottom. Take a wire and jump 4 and 5 together, then turn the iginition key to the on position and count the blinks of the ABS light for the codes.

 

[driller]

The Anti lock test connector is located inside the headlight access door on the passenger side. It's in a red plastic holder. Push it out of the holder and hold it facing you with 2 terminals on top, and 4 on the bottom. They would be numbered 1, 2, then 3,4,5,6 on the bottom. Take a wire and jump 4 and 5 together, then turn the iginition key to the on position and count the blinks of the ABS light for the codes.

Great info that I never knew!

Thanks Bill!

 

[billcu]

You're welcome JP, these cars do have a lot of self diagnostics, the engine, seat, alarm, air ride, hvac,...

Were you able to get any codes 93luxurysnake?

 

[93luxurysnake]

i will test it out tomorrow an see what pulls up cuz i noticed the abs pump was leaking the other day. is there a way to rebuild those pumps or does anyone on here have one they will sale me at a reasonable price?

 

[93luxurysnake]

thanx i will try to get the codes tomorrow. an how hard is it to rebuild those pumps or does anyone have one they will sale me at a reasonable price cuz i noticed mine leaking a lil while back

 

[billcu]

There's some posts here about repacing these parts. The hard thing is finding good used parts though.

 

[chris2523]

i bought a new abs pump for my 93 last year off of rock auto.

 

[Lvnmarks]

What is the process for OBDII?

 

[billcu]

Step one:

Read the codes with a code scanner.

OBD2 is not as user friendly as OBD1.

 

[Lvnmarks]

I need to just buy one and get it over with, getting sick of running to the parts store to use theirs.

 

[93luxurysnake]

well it turns out that my abs issue was all due to one of the shims on the front brake pads had come loose an was rubbing the rotor an was tripping the system! i removed it an put some silicone on the back of the pads to absorb vibration an now i have no issues what so ever from my abs :thumbsup: has anyone else ever heard of this happening?

 

[billcu]

I haven't heard of this. How was it rubbing the rotor? Was it interfering with the sensor?

Did you ever read the codes?

 

[93luxurysnake]

I haven't heard of this. How was it rubbing the rotor? Was it interfering with the sensor?

Did you ever read the codes?

it was on the outboard pad it slid off from under the caliper an was rubbing the rotor hat where the wheel meets an i guess it was tripping the sensor