Forum Discussion

Brysonh801's avatar
Brysonh801
Explorer
Jan 31, 2018

Brake/turn signal lights don't work, running lights do

I have a 1983 terry 30' trailer. A while ago when I first bought it the brake lights and turn signals did work, now I'm facing the problem where they do not work, but my running lights do work, any op...
Bobbo's avatar
Bobbo
Explorer III
Jan 31, 2018
Get this 4pin/7pin tester and see if you are getting power at the back of the tow vehicle. This eliminates 50% of the possible problems. You now know whether the problem is in the tow vehicle or the trailer.

4 pin/7 pin wiring tester

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