Mechanics

WHEN SHOULD VOLTAGE BE PRESENT AT THE COIL?

1988 Dodge Truck • 130,000 miles

Should I have voltage at the coil as soon as the key is on or only when the motor is cranking/running?
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Greg_h_69
May 29, 2012.



As soon as the key is turned on.

What is the issue?

Roy

ASEMaster6371
May 29, 2012.
I don't have voltage going to the coil. The pcm has been replaced with a re-manufactured one.I put one on and when that didn't fix it I thought it was bad and exchanged it for another one. It ran for about 20 minutes then started acting up again. No voltage at the coil. I then unhooked the power from the coil and ran a jumper from the battery. Still won't start.

Tiny
Greg_h_69
May 30, 2012.
I would look at the ignition switch as the power comes from there not the pcm. If you have your original one, re install it and start from scratch.

Roy

ASEMaster6371
May 31, 2012.
If it would be that, why won't it start when I run a jumper?

Tiny
Greg_h_69
May 31, 2012.
Because the ignition side feeds more than just the coil.

Roy

ASEMaster6371
May 31, 2012.
I'll try it. Thanks

Tiny
Greg_h_69
May 31, 2012.
I put a new ignition switch in it. Still doing same thing. It will run sometimes. When it dies and won't start still no power to the coil.

Tiny
Greg_h_69
Jun 3, 2012.
Did you test for power to the coil on the positive side?

Roy

Yes

Tiny
Greg_h_69
Jun 3, 2012.
Guys keep telling me pick-up coil. Could this be it?

Tiny
Greg_h_69
Jun 5, 2012.
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