Primary ignition circuit

1972 PONTIAC CATALINA
500,000 MILES • 7.5L • V8 • 2WD • AUTOMATIC
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MIKE1961
  • MEMBER
  • 24 POSTS
I am supposed to have battery voltage (twelve volts) at the positive terminal of the coil with the ignition "on". I only have 5.8 volts. What might the problem be?
Nov 26, 2017 at 11:42 PM
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PATENTED_REPAIR_PRO
  • ✓ASE Certified Mechanic
  • 1,853 POSTS
  • ASE Certified Mechanic
Is this a contact point ignition?
I have the wiring diagram and I do not see contact points or any ballast resistor. It is a pink wire coming from the ignition switch that feeds the twelve volts, so check that wire leaving the ignition switch for twelve volts.
Nov 27, 2017 at 6:18 AM
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