Auto-elec question - standlby / leakage current from batteries

Dennis · 2011-01-19T12:04:34+00:00

I've a problem with a truck failing to start after 5 days sitting idle - completely flat batteries, no ignition lights, no "click-click-click", nothing.The electrical sytem is supplied by 2 x 12V batteries. These are 21 plate, 800 CCA big lead acid units, each larger than a large 4WD battery. The charging system works fine with over 28V at fast idle, and around 26 at idle. It starts fine after a couple of days sitting idle.I've measured the standby current draw from the batteries with everything switched off at around 150mA. As far as I can tell the standby current mainly goes into the remote entry system and a 24/12V converter.From my rough reckoning, 5 days @ 150mA = 120 x 0.15 = which should have bugger all effect on such large batteries.Comments or suggestions???Thanks.

Jan 19, 2011 20 Replies

Rate this thread:

no one 15 years ago

ya alternator is shagged..... its shorted / open dieode etc....

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required

Auto-elec question - standlby / leakage current from batteries

Related discussions

Problem changing from power supply to battery

Charging batteries inside an appliance

Switching large currents

Join the Discussion

Didn't find your answer?