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.
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HOMESERVICE MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 24 (ENGINE COOLING FAN)SYSTEM TESTING
1984 Plymouth Horizon Base, 1.6 A
System Testing
1984 Plymouth Horizon Base, 1.6 ASECTION System Testing
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Eagle Vision, 1994 Dodge Spirit, and 1994 Dodge Shadow. However, it is still accessible from the selected car via links, so may be relevant.
- Check fan motor operation. See MOTOR under COMPONENT TESTING. If motor is okay, turn ignition on and check for voltage at fan relay Gray (or Light Green/Black) wire. Radiator fan relay may be located in power distribution center (left front inner fender panel) or in front of left strut tower. See Fig 1 . If battery voltage exists, proceed to next step. If battery voltage does not exist, check for open or short in Gray (or Light Green/Black) wire circuit.
- Install jumper wire between Gray (or Light Green/Black) and Light Green (or Dark Blue/Pink) wires on radiator fan relay. If fan operates, proceed to next step. If fan fails to operate, check for open or short in Light Green (or Dark Blue/Pink) wire between radiator fan relay and fan relay motor connector.
- If fan operates, warm engine to normal operating temperature. Check for loose connections on fan motor and at fan motor relay. If all connections are okay, check for fault codes.
- Fault codes can be checked by using diagnostic connector, located in front of left shock tower. Refer to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE for complete instructions on connecting diagnostic connector and checking for fault codes. After checking fault codes, see COMPONENT TESTING . Repair as necessary.
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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.