Pertronix help

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Nov 25, 2013 | 09:30 PM

Schlurch

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Pertronix help

Ok this may be covered somewhere else but I can't find it. Background: 1971 F250 with 390 from a '75. Just changed out the points for the Ignitor I hardware from Pertronix. I have a Flamethrower I coil (40,000 v, 1.5 ohm) that I want to install in place of the original, but their instructions suggest removing ballast resistor or resistance wire if installed, and provide instructions for determining if one is present in the first place. Followed guide, found 6.8 (ish) volts at coil with ignition on but engine off, using multimeter. I assume the new coil needs 12, but I can't find ballast resistors, and there's no pink wire going to the coil from anywhere. I can upload pictures later of what I have and maybe somebody will have insight in the meantime.

Nov 25, 2013 | 09:34 PM

Schlurch

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Nov 26, 2013 | 05:33 AM

gfw1985

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From: Raphine, Virginia

The pink resistive wire is behind the dash. Changing colors before it comes thru the firewall. Personally with the P1, I'd just use the stock coil.

Nov 26, 2013 | 05:33 PM

ilbiker

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I ran a new wire from the coil location to the ignition key and half tapped off the existing wire before the resistor wire. this allows me to use the new coil and ignition and in case of emergency, I can place the original coil and points in without redoing everything again. So far, no issues and runs great.

Nov 27, 2013 | 05:37 AM

yetiman38237

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From: Mayfield, KY

I know if I had a pink wire I would hide it behind the dash too.......

Nov 29, 2013 | 04:24 AM

Schlurch

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Quote:

Originally Posted by gfw1985

The pink resistive wire is behind the dash. Changing colors before it comes thru the firewall. Personally with the P1, I'd just use the stock coil.

Thanks for the tip but I already have the new coil. Does I cone straight from the ignition switch? What's the best way to replace it?

Nov 29, 2013 | 04:26 AM

Schlurch

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Quote:

Originally Posted by yetiman38237

I know if I had a pink wire I would hide it behind the dash too.......

Nice. That's good.

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Nov 29, 2013 | 10:01 AM

ilbiker

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Quote:

Originally Posted by Schlurch

How is it wired to th switch? Did you have to make a new connection with the new wire to the switch? I can't really see back there very well.

They are all wired to the center post on my switch positive. After looking over it and finding the correct wire, I used a half tap connector to the wire it directly to it. I used the wiring diagram I found on line to verify and wanted to keep the orignal wire just in case. Taped it up and left it there next to the coil line.

The key switch comes comes right out by removing the bezel so you can get easier access to the switch wiring. Unscrew it and pull it from the back and it makes it much easier to work with it.