826 battery draining

Chochy · Oct 19, 2009

Got an 826 with a german diesel. Seems like the batteries are always draining. Replaced cables, put in new batteries, new alternator--no radio or lights left on. Any thoughts? Is it possible that the starter might be draining somehow whenit is setting?

Janicholson · Oct 19, 2009

Pull a battery cable. use a 12v test light between the cable and the bat post. If it lights, it has a drain. Use the same method to find the thing that is on. Not likely the starter. Try the big post on the altenator first. JimN

El Toro · Oct 19, 2009

It may be the regulator. You can install a master switch in the ground cable that will isolate the battery from ground. No one will be able to crank the engine unless they find the master swith. The military has used this for years. Hal

Anonymous-0 · Oct 19, 2009

check battery with volt meter to see if alternator is charging to the correct voltage 14.5 to 14.9 while running.if so two things could be your trouble,first disconnect hot cable on battery, slow charge battery with battery charger until fully charged,had a new one in a truck that after a day or so of not running it wouldn't start,carried it back to alternator shop where purchased tech. gave me another, to us told to come back after mine in the morning, after charging over night, putit back in the truck worked perfect don,t know why but it did. second check alt.to make sure it's not staying excited or on when engine is shut off,asuming you have a 10 si delco unplug 2 wire plug from alt. check white or one that hooks to #1 termnial for voltage, should dead with engine and ignition off if not it will slowly drain battery,for other style alt.disconnect regulator while not in use, see if that solves problem, if it does alt. is staying on.

826 battery draining

Chochy

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Janicholson

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El Toro

Well-known Member

Anonymous-0

Well-known Member

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