Test 12: THERMO Timer
- Check that timer is properly installed and firmly seated. Check radiator for correct coolant level. Bleed cooling system.
- Disconnect timer and check resistance values between plug terminals "G" and "W", "G" and ground, and "W" and ground. If values are correct, trace timer circuit and repair wiring. If values are incorrect, replace timer. See Thermo Timer Resistance Specifications .
THERMO TIMER SPECIFICATIONS
| Circuit Tested | Ohms | |
|---|---|---|
| G to Ground | 40-70 | |
| G to W & W to Ground | ||
| Above 60°F (15°C) | Infinite | |
| Below 60°F (15°C) | Zero | |