Batteries keep dying

[4RTrailnSC]

Have a 2010 Trail with no added accessories. 1 month ago battery died. Pulled it and had it tested. They said it was a bad battery and gave me a new one under warranty free of charge. Now my 1 month old battery is dead. Nothing was left on at all. Any ideas?

 

[TEN613RPro]

Have a 2010 Trail with no added accessories. 1 month ago battery died. Pulled it and had it tested. They said it was a bad battery and gave me a new one under warranty free of charge. Now my 1 month old battery is dead. Nothing was left on at all. Any ideas?

Check alternator. Bad Batteries and Alternators have a way of chasing each other.

 

[flyrv9]

You could have a short somewhere. I'd connect a current meter in series with the positive lead of the battery and see if there is a draw with the vehicle off. There should be a small draw for systems that stay powered like computer memories, clock, and other settings; but not enough to drain it. Or, take it somewhere and have a battery starter tester connected. With the vehicle running it will check your battery and charging system to rule out any issues there and eliminate the alternator / regulator.

 

[BobsTrail]

Anything plugged into the ODBC socket? I had a unit from Auto Club that took enough power to make a no start situation after a week or more. This one got me on two vehicles.

I removed it and problem solved. I did the current drain as suggested above and saw 250 to 300 ma. After pulling the unit, it drops down to around 20 ma.

 

[Randyman...]

Any interior LED Light upgrades recently? I had a few LED's that would barely stay on with all doors closed - but would take 2-3 days to drain where it wouldn't start (Like parked at the airport )...

 

[Cndnmax]

Any interior LED Light upgrades recently? I had a few LED's that would barely stay on with all doors closed - but would take 2-3 days to drain where it wouldn't start (Like parked at the airport )...

Not sure those LEDs is what drained your battery. Current leak from the controller is what keeps those LEDs dimly lit, current leak doesn’t disappear with new bulbs you just can’t tell on most bulbs.

 

[wcjeep]

With everything off. Pull the negative cable. Set your multimeter to Amp(erage) or 10A setting. Some meters require physically moving the Red lead. Place one side of meter to battery, second side to the now removed cable. What is your amp draw?

Also, with everything connected. What is the voltage at the battery with engine off? Engine on? Voltage is typically an indicator of alternator health.

 

[Lester Lugnut]

With everything off. Pull the negative cable. Set your multimeter to Amp(erage) or 10A setting. Some meters require physically moving the Red lead. Place one side of meter to battery, second side to the now removed cable. What is your amp draw?

Also, with everything connected. What is the voltage at the battery with engine off? Engine on? Voltage is typically an indicator of alternator health.

This worked before the advent of microprocessors that wake up when pinged.

Perform a voltage drop test across the top of all fuses in both fuse boxes. You will need to quiesce the door switch(es) when performing this test on fuses that reside in the interior fuse box.

When you do this, wait about 30 mins after the car has been shutoff to allow "memories" to go to sleep.