I have a 96 RMW and have been experiencing parasitic battery drain. I have replaced the battery, Alternator, and positive and negative battery cables.
I fully charge the battery with a battery charger. remove the ground cable from the terminal With 30 mins for the pcm to be fully shutdown - not sure if needed but does not hurt place a multimeter on current/Amps, plug probes in proper locations com and 10A or 20A depending on the multimeter Connect one probe to the battery cable and one to the terminal on the battery
Any thoughts on what i am doing wrong? i have tested with 3 multimeters with the probes are in the proper location to measure DC Amps I did this same procedure in the past on other cars without issue.
If you are getting 10-20 amps of current in the off state, you don't have parasitic, you have a hemorrhage. You must have a stuck relay or some other non shutting off device in the car. Time to start pulling fuses and relays, one at a time, to find our where the power is going.
silverfox103, Fred Kiehl and Wojtek like this post
Fred Kiehl
Posts : 7290 Join date : 2009-11-13 Age : 76 Location : Largo, FL 33774
The module is a direct connect to B+, but is controlled by the HVAC unit. If it is electronic, it will cause the fan to run at high speed if there is a failure. If the fan does not run continuously, that would not be the problem.
goldwolfnhn
Posts : 328 Join date : 2019-07-11 Location : Stevens Point, Wisconsin
though my brother had a 93 RMW that had a severe drain, he couldn't even drive 5 miles without having to change batteries, all he figured was that the problem was somewhere on the passenger side, but he sold it to someone looking for a demo car rather than trying to dig through the harness to find the issue
Fred Kiehl
Posts : 7290 Join date : 2009-11-13 Age : 76 Location : Largo, FL 33774
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