Hey folks, got a problem with my son's 2014 STX. Bought it used in 2021. Since then he's had to put 6 or 7 new batteries in it. We've had it to several shops and no one can seem to figure out what is constantly draining the battery. Doesn't matter what time of year either. We're at a loss right now but he needs his damn truck!! Any one have any similar issue or any clue as to what we should be looking at other than the obvious (alternator, etc.)? The shop it's at right now is looking at replacing the gear shift, not sure why but he's a friend so I don't think it's that he's trying to gouge us. Last week they tried replacing the ignition cylinder because it's technically an accessory? Problem is when they have it hooked up to their computer, it doesn't do it. FINAL STUPID question, would leaving a phone charger plugged in all the time have anything to do with it? My son say no way but thought I'd ask.

 

suggest either finding a better technician, or studying up on diy diagnostics. YouTube up ‘parasitic battery drain test’ etc.

in the meantime, I’d start by:

- have battery and alternator professionally tested at a large auto parts store (free)

- buy a battery cutoff switch (will prevent battery from draining as long as he remembers to use it). Use it until you find the drain

 

Like this....

 

As for leaving your phone charger plugged in, it's usually not a big deal, especially if your car's running. But if you keep it connected when the engine's off all the time, it might slowly drain the battery. Not super likely, but it's good to think about all angles.

Since the problem doesn't pop up when you're hooked up to diagnostic tools, you might want to dig into intermittent issues. Take a look at the wiring, connectors, and control modules for any wear, corrosion, or loose stuff.

Also, check for a parasitic draw. That's when something in your truck is sucking power even when it's supposed to be off. Could be a wonky component or a short circuit hiding somewhere. A solid auto electrician should be able to figure this out for you.

 

Not a stupid question. But usually, no. Not if there's nothing plugged into the charger. If there's no phone plugged in, then there is no load, which means that it's not drawing any power. Most phone chargers are 5 volts, from 1 amp to maybe 3 amps, which would demand 15 watts at the most. In a vehicle without any problems, that phone would be plugged in for weeks before it could kill the battery.


You need someone who specializes in automotive electrical work. 6 batteries in 3 years is not normal. Somebody needs to look for parasitic draw and bad grounding.