Power and Ground Distribution: Description and Operation: Tools and Equipment

Tools And Equipment

Power Supply







When testing power supply to an ECM, the DISplus/MoDIC multimeter function as well as a reputable hand held multimeter can be used.

It is best to make the checks at the ECM connection, this method includes testing the wiring harness.

The correct Universal Adapter for the MS S54 application should be used (#90 88 6 121 300). This will ensure the pin connectors and the harness will not be damaged.






When installing the Universal Adapter to the ECM (located in the Electronics Box in engine compartment), make sure the ignition is switched off.




The Engine Control Module Relay should be tested using the relay test kit (P/N 88 88 6 613 010) shown on the right.

This kit allows testing of relays from a remote position.

Always consult the ETM for proper relay connections.