Coolant Temperature Indicator
- Temperature bulb should glow when engine is cranking and when coolant temperature is above 270°F (132°C). If engine is cool and light remains on, disconnect Dark Green wire to sending unit (near A/C compressor). If light goes off, replace sending unit.
- If light stays on, lower steering column slightly and disconnect Dark Green wire from ignition switch. If light goes off, replace ignition switch. If light is still on, check continuity between sending unit and printed circuit. If wires are good, replace printed circuit. If light does not come on with engine cranking, check for blown "gauges" fuse.
- Disconnect Dark Green wire at sending unit. If light comes on, replace sending unit. If light does not illuminate, check bulb and printed circuit connector. If bulb and connector are good, lower steering column slightly and ground Dark Green wire at ignition switch. If light comes on, replace ignition switch. If light does not illuminate, check continuity of Dark Green wire. If wire shows continuity, replace printed circuit.