Thread: Ignition wiring

Tweet

ok, here's my dileima, I'm putting on a MSD 6 BTM box on my '67 Falcon, using a factory DSII distributor and a 8869 harness for the DSII- MSD connector ( plugs into the factory distributor plug ). that's the easy part. next part is, I need a 12v switched source, and I know my coil wire is my best bet, but it's a resistor wire, and when I checked it, produced 7.2V at idle ( I was having an intermittent problem with the bypass circut, so it wouldn't start, no need for a bypass ne more, so I'm not worried ), not enough for the MSD I don't belive. now, I know that I have to splice b4 the resistor wire, or run a new wire off the ign switch, but... which wire is it? I had every wiring diagram I needed ( even tho it was for a Mustang, Falcon and Mustang harnesses, are the same ) on my computer, but IDK where I put them. I kno I could go the easy way out and get a relay that will act on the low voltage, and wire it in that way but, that's cheap.

Just take your test meter, and see which wire on the switch is hot in the run position, connect your new wire to that terminal......

make sure its also hot during cranking or youll still have starting issues.

Originally Posted by Gearhead559

make sure its also hot during cranking or youll still have starting issues.

I could fix and connect the original bypass to the MSD box switched wire, if it wasn't hot on cranking

Matt, I'll PM you a copy of a 66 Mustang wiring diagram as soon as I get out to the garage.