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 MANUALSJEEP1986CHEROKEE BASE, 2D UTILITY, 2.8 W, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETUNE-UPIGNITION SYSTEM - SOLID STATETESTINGCURRENT FLOW CHECK
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, Automatic
Current Flow Check
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, AutomaticSECTION Current Flow Check
- Remove primary connector from ignition coil. Remove both wires from connector. Connect ammeter between positive terminal of coil and disconnected positive primary wire.
- Connect jumper wire from negative terminal to good ground. With ignition switch on, current flow should be approximately 7 amps. Replace ignition coil if current exceeds 7.6 amps.
- With ammeter connected to coil positive terminal, remove jumper wire from negative terminal. Connect coil Green wire to negative terminal. Current flow should be approximately 4 amps.
- If less than 3.5 amps., check for poor contact at connectors or distributor ground screw. If current flow is above 5 amps, the control unit is defective and must be replaced. Normal current flow with engine running is 2.0-2.4 amps. Replace control unit if not to specification.
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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.