2005 Excursion ABS No Communication?

RNally · Jul 9, 2015

Have a 2005 Ex in the shop with complaints of Speedo intermittently not working and ABS light on dash. Hook the IDS up an it will not communicate with the ABS module. It's telling me an issue on the ISO K line?

Circuit from ABS connector to DTC connecter tested good. Powers and grounds for module tested good as well. Even swapped another module on just to check with no changes.

Somewhat lost at this point. Pinpoint tests seem to just be running me in circles.

If anyone has any suggestions, it would be greatly appreciated.

RNally · Jul 10, 2015

co04cobra · Jul 10, 2015

Try unbolting and cleaning the ground behind LH head light.

I know you said ground checked good but I've found them corroded between the radiator support and the connection. The ground would check out but wasn't actually grounding the connection.

Worth a try.

RNally · Aug 2, 2015

co04cobra said:
Try unbolting and cleaning the ground behind LH head light.

I know you said ground checked good but I've found them corroded between the radiator support and the connection. The ground would check out but wasn't actually grounding the connection.

Worth a try.

Just giving an update. This was exactly it. Cleaned up the connection and everything is working fine again. Thank you sir.