Voltage Supply and Ground to Ignition Control Unit

With the ignition off, remove the harness connector from the ignition control unit. Check for voltage between connector terminals 2 (-) and 4 (+) as shown in Fig. 3-4. There should be battery voltage when the ignition is turned on. If there is no voltage, check for wiring faults. Check the continuity of the wire from terminal 2 to ground, and from terminal 4 of the connector to terminal 15 of the coil. Repair wiring as necessary. For current flow diagrams, see CURRENT FLOW DIAGRAMS.

Fig. 3-4.

Ignition control unit voltage supply being checked at connector terminals 2 and 4.