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Ask Chris (aka-Moose) Your Own Question
Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 1171
Experience:  16 years of experience
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Left turn signal and brake on trailer fail. tried on

Customer Question

left turn signal and brake on trailer fail. tried on different trailer and works fine. changed all wiring and lights, still same problem
JA: Have you checked the fuse?
Customer: 10 amp or 30 amp?
JA: What is the model of your '10 Toyota?
Customer: tacoma 2013
JA: Are you fixing your Tacoma yourself? What have you tried so far?
Customer: checked engine compartment fuses, tested with tester, changed all wiring and lights, hooked up another trailer and everything worked.
JA: Anything else you want the mechanic to know before I connect you?
Customer: had incident where 10 amp fuse blew
Submitted: 1 year ago.
Category: Toyota
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. This really sounds like a poor ground or non-existent ground wire on the trailer. We can check thsi if you have ameans to test voltage and continuity.

Customer: replied 1 year ago.
lef light has a ground and it's connected
Expert:  Toyota Service replied 1 year ago.

Can you check for power and ground with the lamps illuminated? It is possible that the ground is insufficient.