Will Changing Vehicle Taillights Cause Issues with Trailer Wiring

Question

Question:

Would changing all my signal lights on my 2018 Journey cause the trailer light converter not to work?

asked by: John H

0

Expert Reply:

Hey John, under normal circumstances no changing the taillights on your vehicle shouldn't interfere with the trailer wiring working. Is that what happened to you? If so, did you change bulb type on the vehicle like going to an LED? What type of trailer wiring do you have?

expert reply by: Jameson C

0

Jameson C.

9/2/2025

Hey John, did you have a chance to check if changing the bulb type on your Journey affected the trailer light converter? I'm asking to ensure I can assist you further if needed.

Chiefh

9/2/2025

@JamesonC It seems that it all works as long as CANBUS LEDs are used. I tried to use an external resistor and that did not work for me and in the process probably cooked the 12-V power fuse to the converter, making it inoperative. In checking the fuse, I found that I had upsized the fuse (20-A), but it still opened. For the current project i replaced the fuse with the correct size (15-A). Now it all works great. Thanks for your help.

Jameson C.

9/2/2025

@Chiefh Nice!!

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Answer 2

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Answer 3

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Answer 7

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Answer 11

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Answer 12

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Will Changing Vehicle Taillights Cause Issues with Trailer Wiring

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