Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Ford Tempo BaseFACTORY OEM SERVICE PROCEDURE
Circuit Protection Devices
CIRCUIT PROTECTION DEVICES LOCATION
| Component | Location | |
|---|---|---|
| Circuit Breaker | ||
| All Wheel Drive | 20 amp near starter relay. | |
| Alt. Voltage Sensor | 18 amp in starter relay wiring harness. | |
| Passive Restraint Module | 20 amp on left front of strut tower. | |
| Power Window, Door Lock & Seat | In cavity No. 12 of fuse block. See Figure . | |
| Windshield Wiper | In cavity No. 2 of fuse block. See Figure . | |
| Fuse Block | Under dash, left of steering column. See Figure & Figure . | |
| Fusible Links | ||
| A/C Cooling Fan Controller (Blue) G | At ignition switch wiring harness, in Gray/Yellow wire. | |
| Air Bag Module (Blue) F | On starter relay. | |
| Charging System (Green) D | On starter relay in charging circuit wiring. See Figure . | |
| Cooling Fan Relay w/o A/C (Black) R | On starter relay. See Figure . | |
| EEC (Brown) J | On starter relay. | |
| Ignition Switch (Black) B | In wiring harness at starter relay. | |
| Lights (Black) A | In wiring harness at starter relay. | |
| Passive Restraint System (Black) H | In wiring harness at starter relay. | |
| Rear Defroster & Fuel Door (Brown) E | In wiring harness at starter relay. See Figure . | |
| Voltage Regulator (Brown) M | Near starter relay in charging circuit wiring. | |
| Power Distribution (Blue) P | Near left front strut tower. | |
| Ignition Suppressor Resistor | In engine wiring harness behind left strut tower. | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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