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 MANUALSJEEP1987CHEROKEE LIMITEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM4.0L MPI SYSTEMDIAGNOSIS & TESTINGCOMPONENT TESTINGSTARTER MOTOR RELAY
1987 Jeep Cherokee Limited
Starter Motor Relay
1987 Jeep Cherokee LimitedSECTION Starter Motor Relay
- Disconnect electrical connectors from terminals "I" and "G". Using an ohmmeter, measure resistance between the terminals. Resistance value should be about 22 ohms. Measure resistance between either terminal and battery negative post. Resistance value should be infinite. If resistance values are not as specified, replace relay. If okay, reconnect electrical connectors.
- Disconnect electrical connector from "SOL" terminal. Connect voltmeter between terminal and battery negative post. While observing voltmeter, turn ignition switch to "START" position. If 12 volts is not indicated, check and repair wiring harness, bulkhead connector, and/or ignition switch. If battery voltage is present, go to next step.
- If battery voltage is present, but starter relay does not work, place transmission in Park (Neutral for man. trans.) and apply parking brake. Disconnect electrical connector from terminal "I" (Dark Green wire) and apply battery voltage to terminal. Using a jumper wire, touch terminal "G" to ground. If relay does not click, replace relay. If relay does click, repair ground circuit.
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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.