Trailer Running Light Circuit Keeps Blowing Fuses on Tow Vehicle

Updated 03/25/2010 | Published 03/23/2010

Question:

all of my trailer lights work fine except for my running lights. it keeps blowing my fuse and i can not figure out what the problem is. what is my problem?

asked by: Brad T

Expert Reply:

Chances are the running lights are drawing too much current. You simply have more running lights on your trailer than your car tail light circuit can handle. The best way to correct this is to remove some of the running lights or use a powered trailer harness like part # C59496.

Instead of pulling power through the vehicle lights, a powered trailer harness draws a new source of power straight from the car battery. It still connects to the tail light and blinker circuits, but they are used as switches rather than power sources.

If you write back with the year, make and model of your vehicle and tell me what trailer harness you have on it now, I can see what options are available.

expert reply by: Patrick B