Coolant replacement on a 66 Shelby Mustang

[Bob Gaines]

I spliced the Pertronix red module wire to the yellow 12 volt wire and left the resistor wire on the positive and now the car only turns over but does not fire.  It actually sounds like my Saleen Mustang when I removed the rotor from the distributor to prevent easy theft.  I can change back to the three wires again on the positive and shop around for a dual points distributor me thinks.

I would use a multimeter and check your yellow power wire for 12 volts with the key on. It sounds like you are not getting power to your module.

Okay.  I will have to buy a multimeter. Then I will see.  These issues are interesting for me, getting into how things work.

Harbor Freight has a inexpensive digital one for 6.99!

[S7MS427]

Richard,

Multimeters can also be had cheaply at both Lowe's and home depot.

[shelbydoug]

Simple answer. Dual points. Yellow top. Problem solved.

Someone explain it to me? How is the Petronix the problem solver? Even a single point is better then this nightmare.

[Royce Peterson]

The backup lamp circuit does not have 12V+ when the engine is cranking so the car will never start.

[Bob Gaines]

The backup lamp circuit does not have 12V+ when the engine is cranking so the car will never start.

That would explain things.

[67350#1242]

Re posting diagram from earlier Pertronix thread.  Hook it up this way and it will work right.

[S7MS427]

Re posting diagram from earlier Pertronix thread.  Hook it up this way and it will work right.

Agreed. This is how I have mine wired on my '67. I have never had a bit of trouble in using it for over 20 years. If you are nervous about failures, carry an extra breaker plate, points, and condenser in the glove box.

Did I mention how much I hate setting points?