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Home >> GMC >> 1996 >> Forward Control 4.3 W >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Engine Controls - System/Component Tests - 7.4L) >> Computerized Engine Controls >> Control Unit >> Ground Circuits
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Ground Circuits

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 1995 GMC Vandura Special, 1995 GMC Vandura, 1995 GMC Suburban, 1995 GMC Rally Camper Special, and 1995 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using an ohmmeter, check for continuity to ground on ECM/PCM/VCM ground terminals. Resistance should be zero ohms. If not, repair open to ground.
  2. Using a DVOM, touch negative lead of voltmeter to a good ground. Touch positive lead of voltmeter to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If voltmeter reading is greater than one volt, check for open, corrosion or loose connection on ground circuit.
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