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Cu Power Supply

  1. Disconnect CU connector. Connect positive voltmeter lead to terminal 35 of CU harness connector. Connect negative test lead to terminal 5 of CU harness connector. Turn ignition switch to "RUN" position. Voltmeter should read battery voltage.
  2. Connect voltmeter positive test lead to terminal 18 of CU harness connector. Connect negative test lead to terminal 5 of CU harness connector. Turn ignition on. Voltmeter should read battery voltage.
  3. If no voltage is available, remove DME power relay. Using a jumper wire, connect terminals 30 and 87. Repeat voltage checks in step 1) and 2). On 944, connect voltmeter between terminals 3 of 9-pin connector and ground. If no voltage, check battery and related circuits.
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