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Battery Drain, dead battery

Old 09-15-2009, 08:19 PM
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 2
Default Battery Drain, dead battery

I have a Form E350, battery drains slowly.
I disconnected fuses and found the faulty circuit provides power to:
Memory power radio
Rear seat video control unit
Battery Saver relay
Instrunment cluster
Courtesy lamp relay and Accessory delay relay
I also noticed that my power windows do not work when fuse is removed
I realize there is normally a small drain in order to power a few essential items like the clock in the radio etc..., but the battery dies in just a few days. Overnight, even in the coldest of weather, it cranks and starts really good, but left a few days, even in warm weather it's dead.
I did have a weird dash light flashing problem a while back when the key was turned off, and it went away by itself, but i suspect this is related.
Any suggestions?
Old 09-21-2009, 06:24 PM
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 2

This is still driving me crazy.
Does anyone know where the "battery saver relay" is located?
Old 10-11-2018, 04:34 PM
Join Date: Jul 2018
Posts: 84

I feel your pain bud, My brand new battery drains after about 3 days.. wth... I am trying everything to solve the problem. I even had to put a second battery in it just in case i'm on a job in bum >>>> somewhere and no start. Totally dead too .. no interior light or anything.. did you find the problem yet cause it sounds like we have the same issue..
Old 10-12-2018, 04:27 AM
Senior Member
Join Date: Jun 2010
Posts: 9,252

What model year vehicles are we working with?
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