Outer Limits 4x4 Board

Hi all,
just wiring up trailer brakes to the new girl and cant seem to find a brake signal off the brake switch. every time i do it check one of the 3 wires the check esp warning comes on the dash and the brake lights stop working?!?!?
any help welcomed!!

How are you testing the wires? If you're using a test lamp, some ECU somewhere is probably detecting that the circuit impedance is wrong, and flagging an error.

If you're using a DMM, I'm out of ideas.

You need to pick up the siginal from the brake light wire in the trailer plug

niss50 wrote:You need to pick up the siginal from the brake light wire in the trailer plug

spot on