Marker lights and tail lights not working

2008 FORD F-550
50,000 MILES • 6.4L • V8 • TURBO • 4WD • AUTOMATIC
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RIC GORDON
  • MEMBER
  • 1 POST
No power to lights, don't know which fuse to check or what else to check.
Apr 24, 2019 at 7:10 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
Welcome to 2CarPros.

The fuse is located in what is called the smart junction box (SJB). It is located on the passenger side foot well. I attached three pics. The first shows location, the second is a close up of fuse 22 which powers the parking lamp relay. The third picture is a legend of the fuses located in the box. The wiring schematic indicates the lighting relay to be in the SJB also, so if the fuse is good, check that.

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Here are some general links for testing and using specific tools you may or may not need. I'm just adding them in case you do need them.

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https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring


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Let me know if this helps. If you need additional information, let me know.

Take care,
Joe
Apr 25, 2019 at 6:05 PM
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