Wiring Harness & Connector
- With ignition switch off, remove wiring connector from ECU. Turn ignition switch on and connect negative lead of voltmeter to a good ground. Connect voltmeter positive lead to terminal No. 1, then No. 2 and No. 3 of harness connector. See Fig 1 .
- Reading should be within one volt of battery voltage at each terminal with all accessories off. If not within limits, check for proper electrical connections and system ground.