2nd Gen Non-Engine/Transmission abs/brake light

[shendren]

going down the interstate today (all day!) and went into a rain storm somewhere in tennessee.



turned the cruise control on. and when i hit the "set" button, i get a short flash from the "abs" and "brake" lights. what's up?



when i set the "set" button again, no more lights or flashes. cruise works fine.



thanks for any input... .



scott.

 

[lschultz]

Sounds like you got some water on one of them fancy electrical/electronic sensors/connections we are blessed with. It will either act up again or it won't. I would look at the connection that go to the sensor in the rear differential. Good luck.

 

[shendren]

thanks. scott

 

[Cooker]

The wiring harness from the frame rail to the sensor on the top of the rear diff sometimes wears and cracks over time. If it happens in the wet/rain only I would check the harness too.

 

[shendren]

thanks Ryan,



but why when i hit the "set" on the cruise??



thanks. scott.

 

[Cooker]

Hmmm... .



Just a crazy electronic thing maybe

 

[shendren]

well, now it happens all of the time..... only the first time i hit the cruise though. if i set then speed up and set again, it doesn't flash. only on the first time i hit set after being turned on or after the brakes have been hit.



i have checked the connections. all seem ok. it looks like a vacuum connection on the rear diff.



i'm stumped.



i checked the connections at the master brake area and they seem ok as well. would a bad RWAL controller do this? it has no cruise inputs or outputs so i am not sure that would have any effect.



thanks.

scott.

 

[shendren]

one more thing.....



i noticed that under the fuse box, there is no abs relay where the relay should go. there is a pic under the lid but no relay. nor does there to appear to have ever been one there.



was there a 4 wheel abs version of my truck? i don't see a CAB on the driver's fender. in my manual it says the CAB is on the driver's fender for the 4 wheel abs and under the dash for the 2 wheel... .



is this right?



thanks. scott.