Re: 72 TA : New Project
Any electrical gurus out there?
OK, so I figured out the reason I keep burning up the ignition points. I just don't know how to remedy the problem.
Just out of curiosity I decided to check the voltage at the positive terminal of the coil (the black/pink resistor ignition wire and the yellow starter solenoid wire that are crimped together) when cranking versus when running.
It is completely opposite of what it is supposed to be:
When cranking it shows 9.2 - 9.6 volts. Which I imagine is a full 12 volts but reduced by the amount of juice it takes to run the starter motor.
When running it shows around 12.2-12.4 volts.
This is the opposite of what it is supposed to be doing! It should be 12 volts during crank and 9 volts when running. So those full time 12 volts are frying the points.
I just swapped out the ignition switch under the column thinking maybe it was defective but no change. I checked the starter solenoid and it is wired properly with the purple, and yellow wires in their proper position.
Anyone have an idea on this? Is the resistor wire not resisting?
The engine wiring harness was supposed to be the one for the points ignition. (AmericanAutowire part# FB20530) I am wondering if they built me the wrong harness, and gave me the unitized harness instead.
I don't know if this is a blessing in disguise since I am going to upgrade to the M&H breakerless setup this weekend and their site says it will operate on the between 6 to 18 volts. I know that you need a full 12 volts running when you put an HEI distributor in, just wondering if the unitized harness has the same 12 volt running voltage.
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