Motor Vehicle Maintenance & Repair Asked by Brian LeCrone on March 11, 2021
I have a parasitic draw of 280 milliamps with everything turned off and my key fob 15 feet away from the vehicle. I latched the hood latch just in case there is a sensor in it.
I pulled all fuses with no change until I reached the IOD fuse. Pulling that fuse terminated the draw. I don’t know where to go from here because I don’t know what systems are powered by that fuse and how to determine which system is at fault.
After having my 6-month-old battery tested and recharged, I monitored the voltage drop over several days. It is losing 1/4 volt per day.
Does anyone have a recommendation?
Brian.
Disconnect the wire harness from the alternator/generator, wait 20 minutes, then repeat the amperage check with your multimeter. If milliamps drop, replace the alternator. The internal diodes of the alternator are part of the IOD but are not on any fuse.
Answered by Carguy on March 11, 2021
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