joenintiesc
Registered User
I've spent awhile searching through the forum, but I still have a question or two - first the background:
Now I have the hard brake pedal and braking is severely reduced, red brake light on constantly. I don't think the pump is running at all.
I pulled the ABS relay, cleaned it with electrical cleaner - no change. Fuses look good. Ignition switch in steering column was acting up - replaced it but no change in brake issue.
So I replaced the ABS relay with one from Advance Auto, listed as:
BWD ABS Warning Lamp Relay, Part No R649P
This is the gray one, not the more expensive brown one.
It fits - that means it should work, correct?
Also, I came across this info from this article: http://www.albeedigital.com/supercoupe/articles/abs-system.html:
For all applicable model years the Anti-Lock Power Relay and the Hydraulic Pump Motor Relay are located on the passenger side firewall area. When facing the engine bay these relays are located as follows:
90 Model Year (Left to Right) WOT AC Cutout Relay, Hydraulic Pump Motor Relay, Anti-Lock Power Relay
The description above makes it sound like there are TWO relays that are associated with the ABS unit - but I only see two on the firewall in total, and I assumed the other was the WOT relay. Am I missing something here?
I would really like to be able to fix this without pulling the unit - if the relay is not the issue can I test the motor/ pump without removing it? If the pressure switch in the unit is bad - can it be replaced while the ABS unit is in the car?
Any help and assistance would be greatly appreciated!!
- 1990 SC with Cobra brakes and later year spindles
- ABS light has always been on but brakes have always worked great (just w/o ABS), removed ABS light a long time ago.
- Car not driven very often over the last several years. Seemed to be a slow leak of brake fluid, as every time I did drive it the red brake light would randomly turn on and off until I added brake fluid to bring back to proper level.
- Accumulator replaced about 10 years ago, but less than 20k miles on it.
Now I have the hard brake pedal and braking is severely reduced, red brake light on constantly. I don't think the pump is running at all.
I pulled the ABS relay, cleaned it with electrical cleaner - no change. Fuses look good. Ignition switch in steering column was acting up - replaced it but no change in brake issue.
So I replaced the ABS relay with one from Advance Auto, listed as:
BWD ABS Warning Lamp Relay, Part No R649P
This is the gray one, not the more expensive brown one.
It fits - that means it should work, correct?
Also, I came across this info from this article: http://www.albeedigital.com/supercoupe/articles/abs-system.html:
For all applicable model years the Anti-Lock Power Relay and the Hydraulic Pump Motor Relay are located on the passenger side firewall area. When facing the engine bay these relays are located as follows:
90 Model Year (Left to Right) WOT AC Cutout Relay, Hydraulic Pump Motor Relay, Anti-Lock Power Relay
The description above makes it sound like there are TWO relays that are associated with the ABS unit - but I only see two on the firewall in total, and I assumed the other was the WOT relay. Am I missing something here?
I would really like to be able to fix this without pulling the unit - if the relay is not the issue can I test the motor/ pump without removing it? If the pressure switch in the unit is bad - can it be replaced while the ABS unit is in the car?
Any help and assistance would be greatly appreciated!!