Which Fuses Control Trailer Lights On A 2008 Ford F-150?

Published 09/30/2021

Products Featured in This Question

Peterson Combination Trailer Tail Light - 6 Function - Incandescent - Square - Passenger Side

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$5.43

16 Gauge Primary Wire - Black - Per Foot

(63)

$1.09

Deka Heat Shrink Butt Connector - 16-14 Gauge - Nylon Insulation - Blue - Qty 5

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$8.85

Question:

I plugged in my trailer lights and blew a fuse I have replaced every fuse dealing with trailer lights in the fuse panel in the passenger side wall is there an in line fuse for the trailer lights ? If so where is it located I’ve ran the wiring out to the point it goes into the harness

asked by: David H

Expert Reply:

On your 2008 Ford F-150 there is not an in-line fuse for the trailer lights. There is a fuse for the right side trailer lights, # 36, and a fuse for the left side trailer lights, # 42.

If both of these fuse are fully seated and not blown then I would check that relay # 10 is functioning as it controls all of the trailer lights.

Now I would check that there are no shorts on your trailer that caused the fuse to blow. Chances are there is a bare wire contacting the frame somewhere so you will need to trace each wire back from the trailer connector to figure out where the issue is, and replace any damaged sections of wire with # 16-1-1 and heat shrink butt connectors # DW05744-5.

Let me know what you find and we can go into more in-depth troubleshooting if needed.

expert reply by: Samuel C