Trailer ABS light

We’ll be it a Volvo, you should be able to run diagnostics for brakes in your dash menu screen.

 

The abs signal is the center pin in your pigtail. Blue wire.

Abs light coming on when you apply brakes usually is loss of power thru the blue wire. The abs light is telling you it is getting power from the brake light feed.

Check the power supply from truck to the ecm. Check each connection.

Could also be a faulty ground. Check your power circuit first.

Good luck.

 

The ecu control box is usually mounted above or close to the axles. Find your sensor at the hub end and follow back to the computer.

What brand of abs do you have.
Do an ...abs...search, you will find plenty of information on this site.


This wabco link.

Wabco D version ECU Blink Code List

 

Take a pair of needle nose pliers and yank
out the little bulb for the abs light.
Problem solved. You'll never have a abs light
problem again.

 

That abs light will never light on and turn off during an inspection that will fail the trailer.

 

I was talking about pulling the light out
From behind the dashboard.
The one inside the truck.
That's if you can get to it. Lol.

 

You should be able to toggle down from the main screen, down below trip, and etc down to system diagnostics, choose that, then go to brakes. Select that one and it will run a self test

 

A small piece of black electrical tape...over the abs dash warning light