1989 GMC Truck 1989 GMC K1500 no spark

1989 GMC TRUCK
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DARRIN A
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Electrical problem
1989 GMC Truck V8 Four Wheel Drive Manual

While driving, my truck just shut down. I have no spark. I replaced the plugs, wires, Dist. cap, rotor, ICM and coil. I have 12v at the coil and still no spark.Could it be the PCM or the ECM?
Apr 6, 2010 at 11:25 AM
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RASMATAZ
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Test the distributor pick-up coil.
Apr 6, 2010 at 11:31 AM
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DARRIN A
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where is that located and how do you test it. Just so you are aware, I have noone to help today.
Apr 6, 2010 at 11:35 AM
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RASMATAZ
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Its inside the distributor
Apr 6, 2010 at 1:00 PM
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DARRIN A
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The only thing inside the distributor is the rotor and the ICM, have replaced both of them
Apr 6, 2010 at 1:08 PM
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RASMATAZ
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Disconnect the 2 wire connector that connects to the ignition module and using an OHM meter probe the disconnected 2 wire electrical connector that goes to the PICKUP COIL and you should have an OHM reading of 500 to 1500 ohms.

Also check each lead of the pickup coil to be sure that neither wire is shorted to ground.
Apr 6, 2010 at 1:16 PM
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DARRIN A
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all that seems to be fine
Apr 7, 2010 at 2:15 PM
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RASMATAZ
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Where are you checking for spark? coil or the plugwire end
Apr 7, 2010 at 3:48 PM
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DARRIN A
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at the spark plug
Apr 7, 2010 at 11:44 PM
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RASMATAZ
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Check it at the coil side
Apr 8, 2010 at 12:08 AM