I have a 90 F-250, I can't find the RABS module. Where would it be located on my truck? I have the wiring diagram and I am trying to isolate problems with the RABS light staying on. The bulb may just come out. I would like the system to work but it may not since I did the conversion. I will have to old school glide-n-slide it.

Did a search and could not find anything

TIA

 

Have you checked ABS codes yet? They will tell you why the light is on. The module is most likely good.

What conversion did you do?

 

How do you check codes? I may not be able to do that, the ECM is out of the truck as well as the relay harness and EEC test plug. Basically all the EFI wiring is out of the truck, but according the the wiring diagram the ABS is a seperate system, I have tried all the other "fixes" but the thing is still on, so I wanted to check the module and backtrack the wiring according the the diagram.

I put a 97 Cummins Diesel in the truck. No electronics!

 

Cool conversion! Do you have any pics?

The ABS is a separate system. Here's a thread I found on flashing the codes out. The bottom post has the procedure that should work.

https://www.ford-trucks.com/forums/4...ABS+code+flash

 

I knew this sounded familiar.

Did you follow any of the advice given to you in the other thread you started on this same topic?

https://www.ford-trucks.com/forums/6...-computer.html

 

Yes and nothing worked

Pics
https://www.ford-trucks.com/lc/lc.ph...serid%3D991498

I'll read up on that thread. Thanks

 

No one knows where the RABS module is located?

 

It's on the driver's side frame rail roughly under the master cylinder.

 

HOLY SMOKES!!! Awesome truck dude. Sorry off topic but WOW, nice conversion.

 

When you say the RABS module do you mean the RABS valve body or the RABS ECU? The valve body is, as stated, on the inside of the left side frame rail(just follow the brake pipe down from the master cylinder). However the ECU is just above the transmission tunnel and behind the ash tray, grouped with the cruise control ECU. Hope this helps. If you are doing fault finding, go to the Raybestos website, they have a very good step by step fault finding for RABS.

 

lazy
Thanks, I am looking for the RABS ECU. I will take a look at it, I may have pulled something loose from it, I was running a bunch of wires in that area for all my switches so I could have done something in there. Now that I know where it is, some things are coming to mind when I was working in that area had to mod the tunnel to get the new tranny to fit, etc.

Thanks for the help and compliments!