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F150 backing lights not working


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hesterj
New User

Jun 21, 2016, 4:19 PM

Post #1 of 4 (976 views)
F150 backing lights not working Sign In

2004 F150 4x4 backing lights do not come on when reversing. I have checked fuses, bulbs and replaced the DTR sensor, there is definitely power to the DTR but no power getting through to the lights, have aligned DTR per instructions to neutral line etc. Not sure what else to try?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 21, 2016, 4:27 PM

Post #2 of 4 (968 views)
Re: F150 backing lights not working Sign In

If you have power coming into the circuit but the switch is not sending it back out, that is obviously a bad switch but after it comes out of the range sensor, it triggers a relay that forwards a different power source to the lights.






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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



hesterj
New User

Jun 21, 2016, 4:39 PM

Post #3 of 4 (963 views)
Re: F150 backing lights not working Sign In

thanks,
As I just purchased a new DTR switch I'm assuming it's good. How do I check if it's not? Is there a way to check the relay. Sorry I'm not used to electrical diagrams so a little hard to follow.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 21, 2016, 4:45 PM

Post #4 of 4 (959 views)
Re: F150 backing lights not working Sign In

You're going to need a test light or DVOM to test the circuit. If this is not your thing, then you probably need to pay someone else to do it. Someone has to follow that diagram and systematically find out where the power is being lost.

You can at least test both fuses in the diagram.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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