ABS troubleshooting

[gimpyrobb]

I have been informed I will be helping a buddy figure out why his ABS system isn't working. Is there any "trouble items" to look at first, or is this strictly a "follow the TM" type of thing. Thanks for any tips in advance.

 

[Csm Davis]

Check to make sure you have 120 lbs of air and 24 v first then check the box if have a good one to swap in if those things don't get it to working hook it up to the diagnostic box and get ready to pull drums to clean the pickups.

 

[gimpyrobb]

Thanks for pointing me in a direction. Will let you know if he needs parts!

 

[wsucougarx]

Goto post #21 for what I did


http://www.steelsoldiers.com/showth...r-s-M925A1-Acquisition-and-Build-Thread/page3

 

[wheelspinner]

Gimp check the ground for the ABS system. It is part of the PCB mounting. It grounds through the stud and spacer. I have seen a lot of paint on those four surfaces that can cause a dirty or floating ground.

 

[swbradley1]

I have been informed I will be helping a buddy figure out why his ABS system isn't working. Is there any "trouble items" to look at first, or is this strictly a "follow the TM" type of thing. Thanks for any tips in advance.

Someone around here?

 

[jdknech]

when you are done with there truck, mine needes it too.. lol

 

[jonesal]

My problems were blow fuses (simple to check) and bad connections (no bad parts) at the ECU and valves. Those are easy places to start. However, I did have the Haldex reader and it pointed me right to the bad connections.

Good luck.

Al Jones
84 M923

 

[jarhead1086]

I bought one of the complete ABS kits after messing with mine for a while. I wasn't blowing fuses, just couldn't get the light off. It ended up being my wiring harness after trying a new ECU. My air lines were obviously man handled and I believe the original ABS harness was damaged during that 'maintenance'. It still takes my light a long time to shut off, as in after warm up and some driving. I will continue swapping in new parts from the kit until the light goes out quickly on start up like others I have seen. Like Jonesal said, the connection at the ECU was bad too. The new harness locks up securely unlike the old damaged one. No zip ties and tape required.

 

[1 Patriot-of-many]

On my M923, it was a case of the Army cutting ALL the wires coming through the firewall in their zeal to remove the radios......