How many variations of turn signal questions can there be? I am installing a new wiring harness, meant to be a direct replacement for this model truck from one of the established vendors. It has extra wires for turn signals. I bought the harness some years back and don't remember who sold it...
My truck has aftermarket turn signals mounted which have been working fine, with extra lights front and back, a three prong flasher, and a normal switch mounted on the column. I've cut the wires from the switch, so using terms I vaguely recall from a past life I would describe the switch as single pole double-throw with an accompanying indicator light for the flasher. I would expect one would only need four wires to the switch.
The harness seems to expect me to be using combination brake/turn signals on the rear, and so sends only three leads to the back, parking lights and left and right brake lights. I expect I will need another wire to the back.
The harness leaves 5 wires under the dash for the signals, one for brake light to turn signal switch and four wires to the signals at the four corners of the truck.
My question is to how to run the wiring to the flasher? I suppose the brake light switch should simply send its output directly to a single brake light wire. The turn signal will need a (fused) positive feed from somewhere under the dash (the switched side of the ignition?) but where does this positive go? Switch and flasher? From where does the indicator light on the signal switch get its power?
I suppose I could figure it all out if I just understood how the flasher functions, and had a lot of time and an extra flasher or two.
Thanks all
Karl
