I figured out my problem was the turn signal switch. The switch was worn so when you would activate the hazard lamps the spring couldnt keep the circuit closed. The screw for the hazard **** allowed current to flow through the circuit even if the hazard lights were off because there was no tension on that spring.

If your radio is tied into the brake light circuit you can cut the wire, tape it up and then find another power source for the radio.

 

Say the battery will last 41 days.
It will then be dead.

And even if it were half gone say, 7.5 volts.
Thats not enough to start a car/truck.
Lee

 

I looked at the current draw one fuse at a time and discovered that it was the radio.
Thanks for all of the suggestions.

 

I borrowed my friends fuse buddy and tested every fuse, both in the engine compartment and side of dash panel and found 2 serius draws first is 1.5 amps on the RDO BATT 15A fuse and 1.5 amps at INT BAT 50A mega fuse. Any ideas?

 

hello did you find your problem? I have the same deal and I can't find any helpful info on What that big 50 amp fuse marked "battery" supply power to? when I did the amps test with a digital multi tester it showed 1.14 for a sec with the fuse in then it dropped down to 0.01 but if I take the fuse out it shows 0.00 on the meter and no there more battery drain battery stay charged... I really need to fix this problem

 

my tahoe 2002 5.3 91K lately in the morning weak cranking battery is New RED optima and charging system is great I check for Draw with multi meter shows 0.127 DC is this enough to drain the battery? nothing aftermarket installed it is all original I removed all fuses one bye one stays same except BCM fuse after i removed numbers came down a little I even disconnect the batter terminal at night and i connect the battery on battery tender charger until morning I reconnect the terminals and I crank still was weak cracking please any advice