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Gauge Test - Engine Coolant Temperature Gauge

WARNING: This page is about a different car, the 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect water temperature indicator sender unit C1061. Connect one lead of the Instrument Gauge System Tester to water temperature indicator sender unit C170, circuit 39 (RD/WH), and the other lead to ground.
    Fig 1: Instrument Gauge System Tester Lead Preliminary Setup
    G03437114Courtesy of FORD MOTOR CO.
  2. Set the Instrument Gauge System Tester to 300 ohms. Key ON. Wait one minute. The engine coolant temperature gauge should indicate C (cold). Key OFF.
    Fig 2: Check C (Cold) Indication
    G03437115Courtesy of FORD MOTOR CO.
  3. Set the Instrument Gauge System Tester to 45 ohms. Key ON. Wait one minute. The engine coolant temperature gauge pointer should be in the one-quarter range to mid-range. Key OFF.
    Fig 3: Check Normal Range Indication
    G03437116Courtesy of FORD MOTOR CO.
  4. Set the Instrument Gauge System Tester to 18 ohms. Key ON. Wait one minute. The engine coolant temperature gauge should indicate H (hot). Key OFF. Return to the Pinpoint Test.
    Fig 4: Check H (Hot) Indication
    G03437117Courtesy of FORD MOTOR CO.
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