Where Does the Red Wire on a Brake Controller Attach on a 2002 International 4300

Updated 05/31/2012 | Published 05/29/2012

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Question:

Hi : I am trying to install a Hopkins Impulse controller into a 2002 model 4300 International truck I have the controller mounted and the wires hooked up but not sure as to where to hook up the red wire for the brake switch . can you help with this I have the ground ,power and blue wire hooked up but cant find where the switch wire goes . Can you let me know thanks .

asked by: Terry I

Expert Reply:

The red wire for a brake controller connects to the cold side of the brake switch. The brake switch is located above the brake pedal. There are several wires going in and out of the switch. Use a circuit tester like # PTW2993 to test the wires. You need the wire that shows a signal on the circuit tester ONLY when the brake pedal is pressed. If it shows power with the running lights or turn signals it is not the correct wire.

If you cannot locate this wire, your truck may have a CHMSL circuit (center high mount stop light). There should be a legend on the fuse box somewhere that shows what each fuse is for. If you can find a CHMSL circuit, then you can tap into it.

expert reply by: Michael H