I have the heavy duty 2500 and there is a relay I assume that I see is missing from the box under the hood on drivers side also missing is an ABS pump relay. Will a store like AutoZone or Napa carry that. Not sure if truck had a problem and the previous owner pulled the relay to cover/stop problem. It does have an electric brake control that will light up when I push it. I am hoping that relay will get power back to harness at bumper.

 

What year is your truck?

Do you even HAVE an ABS motor/controller? (only on 4WAL trucks)

 

1995 Ram 2500 with 5.9 4x4 8800#GVW

 

Probably don't have 4WAL then, so, no relay either.

I would check the trailer harness itself and see where ya lose power at.

 

OK, I just assumed when the relay was missing. I think the trailer light fuse is gone from the box under the hood. What is 4wal?

 

4wal stands for 4 wheel anti lock brake mean all four tire have the abs system equipped. older i think 98 and below have rwal which is rear wheel anti lock brakes. HEY YOU correct me on this one. i'm not for sure. but that what rwal and 4wal stand for.