Temperature Gauge
CAUTION:
DO NOT
connect sender wire directly to ground during test.
- Disconnect temperature sender wire from sending unit. Connect a 12-volt, 3.4-watt test bulb between connector terminal and ground. Turn ignition switch to "ON" position. Bulb should illuminate and temperature gauge needle should deflect.
- If results are okay, remove thermosensor (sending unit) from engine block and place sending unit in hot 158°F (70°C) water. Resistance should be 90-117 ohms at 158°F (70°C) and 20-26 ohms at 239°F (115°C).
- Remove instrument cluster from instrument panel. Measure resistance between temperature gauge terminals No. 1 and 2 at rear of cluster. Resistance should be 50-61 ohms. See Fig 1 .