Troubleshooting Trailer Wiring Tester that Shows Stoplights Working but Not Turn Signals

Question:

Hi guys i have checked all the globes and all the wires are clean but i have rh indicator working but not the left and i have stop lights working but not the running lights the earths look clean and inside the plug is clean and wires tight im thinking a broken wire.

asked by: Mick

Expert Reply:

That's really strange to see that the stoplights work on both sides but the left hand turn signal does not work. Those two circuits are carried on the same wire so it seems pretty strange to only see it work with the brake lights and not the turn signal. If you have a circuit tester like the part # PTW2993 handy I'd try checking all of the pins with that or by connecting to a trailer as it sounds like possibly an issue with the tester you are using.

expert reply by: Jameson C