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 MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSMAIN RELAY (COMPUTER/FUEL SYSTEM)TESTING AND INSPECTION
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
Main Relay (Computer/Fuel System): Testing and Inspection
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION Testing and Inspection
Fig. 22 Control relay connector.:
1984-86 Models
Control relay is mounted above the ECU under instrument panel air duct.
1. Check continuity between terminals 1 and 7, then 3 and 7, Fig. 22. If continuity exists, control relay is defective. Replace control relay.
2. Apply battery voltage across terminals 8 and 4, Fig. 22, while testing continuity between terminals 3 and 7. If no continuity exists, control relay is defective.
3. Apply battery voltage across terminals 6 and 4, Fig. 22, while testing continuity between terminals 1 and 7. If no continuity exists, control relay is defective.
4. Apply battery voltage across terminals 5 and 2, Fig. 22, while testing continuity between terminals 1 and 7. If no continuity exists, control relay is defective.
RENDER: 1.0x
NO RELATED
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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.