Quote:
Originally Posted by mickmate
The trailer relays are what is used on a trailer behind American wiring that uses the brake light bulbs as indicators as well. They are simply diodes that only let electricity flow one way. Because the bulbs are used for both if you switch the indicator switch without diodes it also makes both the brakes work and flash. Are the diodes hooked for electricity to flow in the correct direction? They are like a one way valve.
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Nick - as far as I can tell I've got it flowing in the right direction. There is a third wire coming in for power from the brake light switch and the relay is marked "To Vehicle" and "To Trailer" or something like that. There is also something going on with left side versus right side so I think I'm going to go back through all the signal light connections on the right side and see if I can figure out why the front signal light also isn't flashing over there. Maybe I have a loose ground at the front, loose connection or pinched wire somewhere.