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EricFromCT
EricFromCT, Ford Technician
Category: Ford
Satisfied Customers: 3518
Experience:  20 years dealership exp., ASE A1-A9 L1 L2, Ford Lincoln Mercury Senior Master, Diesel Certified
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I have a 2014 f350 diesel, hooked up led reverse lights now

Customer Question

I have a 2014 f350 diesel, hooked up led reverse lights now when I shift into reverse they come one for one second then shut off then I try again and nothing, if I turn truck off and then back on again and try to shift into reverse they come on for 1 second again then shut off, fuse is good..
Submitted: 1 year ago.
Category: Ford
Expert:  EricFromCT replied 1 year ago.

Hi. Are the factory lights remaining on? or are they shutting off as well?

Customer: replied 1 year ago.
No they are shutting off as well
Expert:  EricFromCT replied 1 year ago.

If you disconnect your lights the factory ones work again?

Customer: replied 1 year ago.
No I tried that also, do u think it is a relay?
Expert:  EricFromCT replied 1 year ago.

The reverse lamp relay is only for the trailer tow. WHen you put your truck in reverse the interior fuse panel (smart junction box) sends power to the relay and tees off and goes to the reverse lamps in the tail lamps.

Expert:  EricFromCT replied 1 year ago.

You may have done something that messed up the smart junction box. But it does have internal circuit protection. You can try disconnecting and reconnecting the battery. If the box has tripped a circuit breaker it will reset.

Customer: replied 1 year ago.
Ok I will try that
Expert:  EricFromCT replied 1 year ago.

DO you have a trailer plugged in that could be shorting it in reverse?

Customer: replied 1 year ago.
No there's no trailer or anything hooked up
Expert:  EricFromCT replied 1 year ago.

Try doing the battery then. And do you know what color wires and where they were that you hooked up to?

Customer: replied 1 year ago.
I just disconnected the battery and then hooked it back up and still just comes on for 1 second then shuts off
Expert:  EricFromCT replied 1 year ago.

Did you replace the factory bulbs in the lens' with an aftermarket bulb?

Customer: replied 1 year ago.
No the factory tail light have the factory bulbs and I only spliced into the hot wire to the led lights under the bumper and then grounded them
Customer: replied 1 year ago.
I figured it out never mind. I appreciate your help anyway. It was a loose ground wire..
Expert:  EricFromCT replied 1 year ago.

You didnt disturb the ground on the left rear corner of the frame rail?

Expert:  EricFromCT replied 1 year ago.

Oh ok. Thanks for letting me assist you. Please rate my service and have a good evening. Thank you.

Expert:  EricFromCT replied 1 year ago.

Thank you for using Just Answer. Please rate the service provided and have a great day.