12 volt power from the hot side of the starter relay is controlled by the Pertronix relay and powers the Pertronix Ignitor and Flamethrower coil. The relay is triggered by a wire spliced ahead of the resistance wire at the ignition switch. It is because of the coil that I have the relay. The coil requires 12 volts and the Ignitor likes it (according to Pertronix) although many folks use the Ignitor on the resistor wire without issue. I have both a Pertronix Ignitor and Flamethrower coil. Why would it arc suddenly at startup? Curious. The hot wire to the brake light switch is hot all the time. It is interesting that the smoke appeared as I was starting the car. No odor either but I wasn't close enough when I saw the smoke to smell it and none is noticeable now. No, I have not seen as of yet melted wires but the 2 brake light switch wires are wrapped in tape which I plan to remove to inspect these wires which are fairly brittle at 50+ years. Perhaps it is just by coincidence that you saw some smoke, but I suspect there is a break somewhere in the wire that goes to the turn signal switch, or the problem is in the turn signal switch itself. The power for the brake lights comes from the headlight switch, which is fed from the fuse box, so you have not blown a fuse. Assuming there was no electrical meltdown and you still have 12V going to the brake light switch, I suspect you may as well take apart the steering column and check on the turn signal switch. etent.htmlÄŞBQTBird wrote:You saw smoke, but none of your wiring is melted? Did you notice its odor? Burning electrical stuff is unmistakable and usually leaves its telltale odor behind. Here are instructions on how to get into the steering column if you have not done it yet. You will want to measure for 12V on the green wire in the center when you press on the brakes. php?t=9255 Take a look at the last picture. Here is a good thread showing some pictures of the turn signal switch and some schematics. Why is it on a relay system and how is it wired? You saw smoke, but none of your wiring is melted? Did you notice its odor? Burning electrical stuff is unmistakable and usually leaves its telltale odor behind.
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