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Parasitic Draw Testing

Technical Tip

 

Another method to verify proper battery saver system operation is to simply leave vehicle undisturbed with hood open and under-hood lamp on for about 60 minutes. If under-hood lamp is off after timeout the system is operating normally. If the lamp remains on remove the relay. If the lamp remains on with the relay removed check for a short to power in battery feed circuits after the relay. If the lamp is out with the relay removed verify that there is no continuity thru the relay switch circuit. If continuity exists, replace relay and retest for proper operation. If continuity thru relay switch contacts does not exist with relay removed, replace GEM and retest for proper operation.



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