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Old 02-13-2020, 01:11 PM   #1 (permalink)
Diesel Apprentice
Join Date: Mar 2011
Location: Gulf Coast
Posts: 397

Voltage in old truck with batteries disconnected

I don't drive my truck very often so the batteries are a pain to maintain. I recently got a new set under warranty so I decided to go ahead and install manual disconnect switches on them. I did that yesterday. In the process, I noticed the truck itself has a charge of 0.15 volts on it. I checked it again this morning and it still has 0.13 volts.

Where does this voltage come from? I assume it must be related to the IOD that sucks the power out of my batteries in a few weeks. Is there some sort of rechargeable battery in the radio or computer?

'94 K3500 Silverado DRW long bed crew cab 4X4 with most of the options
Bought on 3/23/11. Current mileage 161,805
It came with new 6.5L TD Goodwrench crate motor dealer installed at 99k miles and 4L80-E trans rebuild at 135k miles
G80 4.10 rear, 225/75 16 tires
New Stanadyne FSD on 3x6x1 aluminum heat sink, remote mounted above and behind the bumper.
Heath Turbo Master, Hayden SD fan clutch & trans cooler
Diamond Eye 4" exhaust, GlowShift diesel combo gauge. Analog EGT, Digital Boost & Trans Temp
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