Quote:
Originally Posted by geezer#99
Do you have a dedicated 12v supply to your hei?
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Not sure, I'll have to do some testing/digging, as I didn't build the truck.
Quote:
Originally Posted by RichardJ
The starter is cranking the engine over, so it's getting 12 V to the ignition switch. If that circuit gets its 12 V by way of the horn relay as a junction block, wouldn't make any difference. The ignition switch needs to connect that 12 V to the Ignition circuit as well as starter solenoid.
The HEI modules are incredibly reliable. I'd check to see if you are getting the 12 V from that 50 year old ignition switch to the batt terminal on the HEI.
Unlike pertronix modules which have a reputation for intermittent problems, any HEI failure that I have ever heard of, including one of my own, when they die, they die.
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Quote:
Originally Posted by geezer#99
If the resistance wire from the ignition switch to the distributor is still being used then he won't have 12v. Likely nearer 7v which causes undue heat in the module.
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Sounds like it's time to grab a multimeter and start testing some stuff.