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Distributor Pick-Up Coil Short & Resistance Checks

WARNING: This page is about a different car, the 1995 Pontiac Trans Sport, 1995 Oldsmobile Silhouette, and 1995 Chevrolet Lumina APV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect pick-up coil leads from module. Using ohmmeter, check pick-up coil resistance. Connect ohmmeter to distributor housing and either pick-up coil lead (step 1 in illustration). See Fig 1 . Flex pick-up coil leads by hand to check fo r intermittent short to ground. If reading is not always infinite, replace pick-up coil.
  2. Connect ohmmeter between pick-up coil leads (step 2 in illustration). See Fig 1 . Check for intermittent open by flexing wire s and connectors. If resistance is not 500-1500 ohms, replace pick-up coil.
Fig 1: Checking HEI-EST Distributor Pick-Up Coil
G93I76560Courtesy of GENERAL MOTORS CORP.
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