Current Flow Test

1. Remove connector from coil.
2. Depress plastic barb and remove positive wire from connector. Remove negative wire in same manner.
3. Connect an ammeter between coil positive terminal and the disconnected positive wire.
4. Connect a jumper wire between coil negative terminal and the engine ground.
5. Turn ignition "On" and note ammeter reading. Reading should be approximately 7 amps. and not exceeding 7.6 amps. If reading exceeds 7.6 amps., replace ignition coil.
6. Remove jumper wire from coil negative terminal and connect the coil green wire to negative terminal. Ammeter reading should be approximately 4 amps. If reading is less than 3.5 amps., check for poor connections at the three wire and four wire connectors or a poor ground at distributor ground screw. If reading is greater than 5 amps., the control unit is defective, requiring replacement.
7. Start and run engine. Ammeter reading should be 2-2.4 amps. If not, replace control unit.