Fuse and Relay Locations for Tow Package Wiring on a 2006 Ford F-150

Published 10/17/2014

Question:

2006 F-150 no tail lights to trailer using 4way or 7way .brakes ok. Is there a fuse bad.which one.can you give me a number

asked by: Cal

Expert Reply:

On your 2006 Ford F-150 there should be fuses and relays used for the tow package wiring.

Since the trailer lights do not work but the brakes do, it does sound like a fuse or relay problem. Under the hood, the #10 fuse is for trailer tow backup lamps and parking lamps. Fuse #36 is trailer tow right turn/brake lights. And #42 is trailer tow left turn/brake lights.

Location #106 is for the 12 volt circuit to the trailer connector.

For relays #R05 is the 12 volt circuit relay. Location #R201 is the parking lamp relay.

Fuses are easy to check but for relays the easiest way to test them is to use a known good relay in place of a bad one.

expert reply by: Michael H