1992 Chevy Truck testing engnition module and coil

Tiny
DRAGONJOHN
  • MEMBER
  • 1992 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
No fire to spark plugs.
Thursday, January 14th, 2010 AT 3:18 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, did you check the coil primary circuits? Pink wire is voltage, goes hot when you turn on the key. Use a testlite, is there voltage?

Engine cranking, the white wire should have a pulse on it. How long since a tune-up? Any codes?
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Thursday, January 14th, 2010 AT 3:46 PM
Tiny
DRAGONJOHN
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  • 3 POSTS
Voltage inthe pink wire, 11.75, white wires, comming into coil and one going to eig. Mod. At dist. Both drop to 9 volts when cranking, but no pulsation to 0 that I can see.
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+3
Thursday, January 14th, 2010 AT 4:53 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Right now, it sounds like the ignition module or pick-up coil. I believe that was your thinking as well? Using a digital multimeter on the voltage setting may not show a pulse, some meters will average the reading between high and low. Probably if you took a reading on the pink wire, engine cranking, the voltage reading would be the same as the white wire.
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Friday, January 15th, 2010 AT 9:30 AM
Tiny
DRAGONJOHN
  • MEMBER
  • 3 POSTS
Installed a new ignetion module. Purrs like a kitten.
Thank you.
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Saturday, January 16th, 2010 AT 7:22 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Glad you it going your way. Thanks for the donation.
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Sunday, January 17th, 2010 AT 9:04 AM

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