LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 1990 >> LeMans Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Power Circuit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Circuit

  1. With ignition off, disconnect ECM connectors. With ignition switch in the ON position, check for battery voltage between ECM terminal connector A6 (Red/White/Black wire) and ground.
  2. If battery voltage is not present, check fuse No. F10 (20-Amp) in fuse panel. See Fig 1 . If fuse is okay, check for an open in Red/White/Black wire between fuse panel and ECM terminal connector A6. If wire okay, check for defective ignition switch.
Fig 1: Locating Engine Performance Components
G121781Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals