Re: Jeep CJ 7 won\'t fire, coil is fine
Coil and module are fine? Makes me wonder about how they were checked.
Have you recently messed with the wires around the starter or solenoid? Sometimes those wire get loose - or mixed up - and short out the ignition.
But - assuming they are -
KEY ON -- Check for voltage at the (+) side of the coil - should be around 7 or 8 volts. If not, find out why.
Check that same point during cranking to make sure it's the same or higher during cranking.
KEY ON - Check the red wire at the module - should be 12v.
Check the black wire at the module - should be 0
If both of those are OK, then:
Disconnect the connector from the distributor.
IF it's a 2 wire connector (Prestolite):
KEY ON -- Take the HARNESS side of the connector - the exposed terminal - scratch it on ground to see if it will cause the coil to fire. If yes that says the module and everything else is fine - problem is inside the distributor.
If it's the 3 terminal connector (Ford) - put an analog - meter type, not digital crap - voltmeter on the orange and purple wires coming out of the distributor. During cranking the needle should swing wildly on a low voltage scale. If not, pick-up coil.