2017 Trailer Backup Questions

[justinrb81]

I am having issues with my 2017 Trailer when backing up. The brakes were locking up when the truck was in reverse on my way to lake yesterday. Came home and started troubleshooting. Found the backup fuse for the reverse circuit on my truck was popped. Trying to figure out why the fuse blew to begin with, so started checking the trailer. With truck fuse fixed I have voltage at trailer plug and relay is working as it should.

Question – With a volt meter I have continuity from the Frame/ground to the “reverse” circuit or the the blue wire, is this normal with trailer disconnected? Or is the what shorted the fuse out?

I see no evidence of the wire being chaffed or rubbed.

[apdriver]

Unfortunately, when doing continuity checks to ground, the multimeter will read through components to show ground. If you think there’s a short, you must disconnect the components when checking for shorts. What you’re seeing is very common.

[JEH in La]

The reverse solenoid may not be the only component that uses that 12 Volts.  Do you have “back-up” lamps on your trailer?  If so, then there may be a short on the wires going to them or the lights could contain water inside of them that moves around to short out your fuse.

[Bass Cat Boats]

It’s either a wire grounded (blue) a light bad or the reverse solenoid if it’s blowing a fuse still.

[justinrb81]

All went well, replaced fuse no issues. Thank you for all the responses, would have never thought about the backup light being an issue.

[JEH in La]

justinrb81:

All went well, replaced fuse no issues. Thank you for all the responses, would have never thought about the backup light being an issue.

Glad you got your problem solved Justinrb81.  Lots of knowledge and experience shared by all on this forum!

[Author]

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