Ranger 4WD V6-3.0L VIN V Flex Fuel (1999)
Temperature Gauge: Testing and Inspection
Preliminary Setup
1. Disconnect water temperature indicator sender unit C170. Connect one lead of Instrument Gauge System Tester to water temperature indicator
sender unit C170, circuit 39 (RD/WH), and the other lead to ground.
Check C (Cold) Indication
2. Set Instrument Gauge System Tester to 300 ohms. Key ON. Wait one minute. The engine coolant temperature gauge should indicate C (cold).
Key OFF.
Check Normal Range Indication
3. Set 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.
