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« on: June 18, 2023, 12:02:50 AM »
I'm glad it was an easy fix Jay and you got more familiar with the circuit. I went over it and the wire from the headlight switch is horn power that also goes to the brake light switch. If it were the horn and brake lights out there is a 15amp breaker in the headlight switch that can go bad from a short. There is another one in there, 18 amps for the headlights. After installing halogens in Louisvilles that traveled long distances, I found the lights would open the breaker after a while causing them to go out. After it cools they go back on but the older the switch the heavier the load, the more it opens, and the more it opens, the more it wants to open. The 18amp breaker opens at nine amps and you learn to replace the switch once and for all by using it to power relays you wire in to handle the load. X and Y. Circuit breakers have a line and load side and are marked at the base of the studs. Flashers were that way too at one time, having a resistor inside that did something to make it that way. They can work or work like a check valve and with solid state stuff there is a in door and an out door, you learn to test items as used just so you don't blow them up and let the smoke out.
You knew the flasher worked because you put it in the emergency socket and it flashed. Testing it where you were putting the voltage on it in the turn signal socket got you the answer to your issue. Ford used all kinds of wiring codes for these switches which during replacement causes problems. Horns that blink and signals that don't. Brake light indicators on the dash and up front where the signals were.
If you can do a maze you can follow a circuit if you know what you're working with. Signal and light problems are simple to work on because you can visually detect what's going on or not. It would be great if you could see the ac output of your duraspark or MSD pickup, but if you don't get intimidated and start with what you understand, before long you'll know how to measure it and why it needs to work.