What is the function of the ECM power relay?

Where is the ECM relay located on a 2004 Chevy Silverado?
- The ECM relay on this vehicle is called an auto shutdown relay and is located in the engine compartment integrated power module control box.
Can a bad ECM power relay cause a dead battery?
- A failed ECM power relay can also cause a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the battery, which will eventually cause it to go dead.
When is the EMC dual channel sequencer module used?
- T he EMC Dual Channel Sequencer Module may be used with the S6000FE, S6000PE, or LR100 series Electric Latch Retraction (ELR) device to provide a delayed signal to operate an automatic door operator or when powering a pair of ELR devices from a single SDC 600 series power supply.


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