1986 Jeep Cherokee Base, 2D Utility, 2.1 B, RWDFACTORY OEM SERVICE PROCEDURE

Current Flow Check

  1. Remove primary connector from ignition coil. Remove both wires from connector. Connect ammeter between positive terminal of coil and disconnected positive primary wire.
  2. 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.
  3. 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.
  4. 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.

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