Originally Posted by knight1485
It rained overnight checked jeep at 21.00 hrs and alarm light was flashing - all normal 07;30 turned ignition on nothing all dead ,got machanic to check and battery charging was at correct point for alternator reading,after several minutes everything worked again clocked showed 00-16 as time battery failed.
Noticed that interior lights didnt go off when I closed the doors today but didnt notice anything last time I locked up,turned lights off by steering wheel stalk,also the heated seat light was on although the heated seats dont work,could any f these two issues have drained the battery which is just a few months old,ive had this problem before when its been heavy rain over the weekend and I dont use the jeep Sundays and Mondays ive a flat battery.something seems to drain her ive tried her 4 times since I got her started today and ive had no problem shes starting fine .
Definitely battery going low. Probably something that drains it more heavily when wet, but it would seem that you'd also be getting drain when dry unless someone has placed a conductor-impregnated object from your battery to ground or similar.
Pick up a cheap digital voltmeter, as it can really help needing to take it to a mechanic as this rolls out.
I'd suggest checking the key/lights off drain under normal conditions to make sure it falls on the low side of normal.
If that's all good, then you may have to figure out how to get it wet, which probably involves really high humidity in addition to possible water leaks hitting something bad.
If all else fails, disconnect the battery when about to rain.
Then, you'll want an ammeter in series with the battery and the load.
Get an automotive one, as it may have to handle a lot of current when you connect the load.
Check the drain and if it is excessive, start pulling fuses to see what drops it.
Work on the ones going to the body unless you have reason to suspect heavy corrosion under hood.