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.