Battery Tenders
Keep in mind I'm a noob to the diesel world,,,,, So twice now the batteries have run down on my Duramax from lack of use. I'm starting to look for an inexpensive tender that I can mount to the vehi...
Forum Discussion
beergardens wrote:mkirsch wrote:
"Have truck checked..."
For what, exactly? Any good mechanic will tell you that minor electrical gremlins are extremely tough to track down, and to pay them to do it may well cost more than the vehicle is worth.
It's a routine matter for a technician to go over the charging system. Test the alternator output, load test AND cell test the batteries, and measure the ignition-off draw. If the draw is over 50mA after everything has timed out, then it's time for the OP to decide if he wants to hunt it down, which often isn't as horrifying as people make it out to be, as long as the tech is knowledgeable.
It's pretty easy to use an ammeter between the truck and battery and start pulling fuses until you find the biggest draws. This will isolate the problem down to one circuit. You may find it is as simple as a cigarette lighter adapter that is always running or a glove box light that never turns off.
