94 ABS codes and details.. problem is?

[negoshe8n]

I have a 94 bravada with 226k original miles. I need to find out what needs to be replaced \ checked on the ABS to get them working again. ABS light is on. Here are the codes I get.

43 RF isolation valve short
44 RF PWM valve short
47 LF isolation valve short
48 LF PWM valve short
53 rear isolation ckt short
54 rear PWM valve short
66 open or shorted motor relay CKT
68 locked or shorted motor circuit
86 ABS light shorted

[ericn1300]

wow, did you get all these codes at once or is this an ongoing problem? sounds like an electrical problem or the ECM went south. the first thing you should do is pull all the connectors on the ABS module and inspect the wiring for damage, clean the contacts and reset the codes

[MT-2500]

As said check wiring and plug ins fuses and power feeds and grounds.
Any service work on brakes or did this happen all at one time?
But with that many codes hard to tell which way to go.
First clear codes and see which ones come back first .
And see if all or any codes will clear.
Post back how code clear goes.

[negoshe8n]

The truck was in a small wreck into the ditch that bent up the fender, cracked grill and bent the frame enough for the previous owner to have it straightened before I bought it. Don't know if that caused the sensors to take a crap. But anyways, ABS light has been on since I got it. Had my cousin read the codes and those are all the codes that came up. Cleared all the codes and have since put around 300 miles it with no ABS light coming back on.. yet. I haven't had a chance to check and see if the ABS is actually working. Will be doing that sooner than later down my driveway or ice from the way the weather is lately. I would have thought that the ABS controller crapped out and all the sensors are now throwing faulty codes. I'll see.

[MT-2500]

Originally Posted by negoshe8n

The truck was in a small wreck into the ditch that bent up the fender, cracked grill and bent the frame enough for the previous owner to have it straightened before I bought it. Don't know if that caused the sensors to take a crap. But anyways, ABS light has been on since I got it. Had my cousin read the codes and those are all the codes that came up. Cleared all the codes and have since put around 300 miles it with no ABS light coming back on.. yet. I haven't had a chance to check and see if the ABS is actually working. Will be doing that sooner than later down my driveway or ice from the way the weather is lately. I would have thought that the ABS controller crapped out and all the sensors are now throwing faulty codes. I'll see.

No light is good.
Let us know how it goes.