[jd87sep]

Im not having any luck finding a diagram that shows the pinouts? (A,B,C,D,H) for a 94 b body. Anyone know where I can find this information? And If I read correctly,in other posts it says you cannot use the paperclip method to read pcm codes, does the same apply for the brake module in abs?

 

[cletus284]

Here are the pinouts: http://www.troublecodes.net/GM/

You cannot read codes on '94 and newer B-bodies by connecting pins A & B.

ABS trouble codes can be displayed by jumpering pins H and A. More info on the ABS system is available here: http://www.goldsswagon.com/ABS/Bosch 2U ABS Systems.htm

 

[jd87sep]

thanks much, Cletus.

 

[jd87sep]

Okay, did the procedure and got three codes, all being solenoid valve faults. Almost impossible for all three of these to go out simultaneously, so what would cause all three codes to be displayed?
41 — Right front valve solenoid fault — Solenoid position not as commanded.
45 — Left front valve solenoid fault — Solenoid position not as commanded.
55 — Rear valve solenoid fault — Solenoid position not as commanded.

 

[HuSSker]

Bad ground on ABS unit under hood?

 

[95BRMW]

Don't mean to hijack, but does this only apply to a 94? I tried to do this on my 95 Caprice wagon and the H terminal is not there.

 

[cletus284]

Don't mean to hijack, but does this only apply to a 94?

It applies to '91 - '94. '95 and '96 need a dedicated ABS code scanner, unless you have a Roadmaster or Fleetwood, then you can view codes through the climate control display.

 

[95BRMW]

Damn! My Roadmaster's ABS is fine, but my Caprice has the light on.

 

[jd87sep]

Update: I cleaned the front two ABS sensors off a few times and switched to ceramic pads, thinking that semi-metallic pads I had on before were creating too much brake dust and interfering with the ABS sensor. Then the light came back on. A/C compressor started making funny noises a couple of days later. Replaced the compressor, no more ABS light. I'm not sure why this threw the ABS light, I'm assuming that it was slipping the belt and causing the alternator to not charge correctly. Not sure, some of you experts probably have the correct explanation, ALL I KNOW IS IT'S FIXED

 

[Rocko350]

Possibly an electronically "noisey" clutch

Chris