Having trouble with my 99 CTD Sport Quad Cab. Batteries went dead while
truck was stored over the winter. I replaced both batteries about 2 weeks
ago. Started the truck on different days over the period of the first week
with no problems. Parked the truck in the driveway and after about 1 week
both new batteries are dead. Seems to be something drawing a small amount
of power continuously. Anyone else had to deal with this particular
Do you have anything aftermarket that has been installed? CB, Amp,
Aux lights, etc? If not, skip next line.
If you do, I would start checking those first. Disconnect the power
wire, pull the fuse etc and see if the problem goes away. If not, it
is something to do with the OE wiring. Check for an open relay, etc.
If you plan on storing the truck for some period of time, pull the IOD
(ignition off draw) fuse in the fuse panel. It's the one with the plastic
shroud around it (as it's intended to be pulled out for storage purposes).
If this is going to be a regular thing, consider a battery tender.
If you suspect a problem beyond the normal IOD current, hook a multimeter
capable of measuring up to 10A of 12VDC (most multimeters can do this - they
have a separate positive terminal to hook the probe to) inline between the
battery and the +12V cable. Read the current draw, and pull each fuse
individually while observing the current draw. This will tell you which
circuit is drawing the current.
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