Dirtman
Former Middleweight Moss Fighting Champion
- Joined
- May 28, 2018
- Messages
- 19,304
- Reaction score
- 13,327
- Points
- 113
- Location
- 41N 75W
- Vehicle Year
- 2009
- Engine Type
- 2.3 (4 Cylinder)
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
- Total Lift
- It's up there.
- Total Drop
- It's down there.
- Tire Size
- Round.
- My credo
- I poop in the furnace.
I've been fighting an electrical gremlin for months now. Every couple of weeks my battery will be dead in the morning. I charge it back up and it works perfectly fine for a while then does it again.
Truck is an 09 2.3 auto base model. Battery is 2 years old and holds 12.65 volts after a charge. I put it on a load tester and it tests perfectly fine. So I moved onto parasitic draw tests. This is where it gets weird.
Initial draw before the computer sleeps is 197.5 mA. After 5 minutes it drops to 71.1mA (computer goes to sleep). After another ten minutes it drops to 8.6 mA (something else goes to sleep). So those numbers are good... BUT, leave it for another 30 or so minutes and the draw jumps to 134.2 mA. Something is "waking up". I pulled every single fuse in both the power distribution box and the smart junction box but once that 134.2 mA draw pops up nothing kills it. If you wake the computer up by opening a door or whatever the same thing repeats. Starts at 197.5 mA, then 71.1 mA, then 8.6 mA, then the mystery device wakes up 30 minutes later and draws constant 134.2 mA. Rinse and repeat.
Any ideas? Heak is 134mA even enough to be killing my battery? I drive the truck every day except weekends. (Usually the no starts happen on mondays so sitting 2 days max) The alternator puts out 14.6 at startup and drops to around 13.6 after 10 minutes of driving so that looks good as well.
Truck is an 09 2.3 auto base model. Battery is 2 years old and holds 12.65 volts after a charge. I put it on a load tester and it tests perfectly fine. So I moved onto parasitic draw tests. This is where it gets weird.
Initial draw before the computer sleeps is 197.5 mA. After 5 minutes it drops to 71.1mA (computer goes to sleep). After another ten minutes it drops to 8.6 mA (something else goes to sleep). So those numbers are good... BUT, leave it for another 30 or so minutes and the draw jumps to 134.2 mA. Something is "waking up". I pulled every single fuse in both the power distribution box and the smart junction box but once that 134.2 mA draw pops up nothing kills it. If you wake the computer up by opening a door or whatever the same thing repeats. Starts at 197.5 mA, then 71.1 mA, then 8.6 mA, then the mystery device wakes up 30 minutes later and draws constant 134.2 mA. Rinse and repeat.
Any ideas? Heak is 134mA even enough to be killing my battery? I drive the truck every day except weekends. (Usually the no starts happen on mondays so sitting 2 days max) The alternator puts out 14.6 at startup and drops to around 13.6 after 10 minutes of driving so that looks good as well.
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