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12-volt conversion

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Dan Padfield

11-14-2001 18:08:22

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I recently converted my 1963 Ford 2000 to a 12-volt system. Starts real well but if it sits w/o being started for several days the battery is drained. When running the system is charging but I'm certain I have bleedback from the battery when idle. Any ideas? I'm stumped. Thx for any advice.

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Jim WI

11-20-2001 10:57:39

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Re: 12-volt conversion in reply to Dan Padfield, 11-14-2001 18:08:22

Was this conversion done with a Delco 10SI? If so, how many terminals are used on the alternator?

If it's only one wire connected to big BAT terminal, it's a one-wire conversion of the standard 10SI. I've heard from others that some of these will drain the battery over time. There's not much you can do beyond disconnecting the battery when you're not using it.

If it's three wires, it sounds like you might have the excitation wire connected to the battery. It should be connected to a switched source of power. The only problem with that is if the coil is connected to the same place, you'll need something to prevent the alternator from feeding the coil (a diode, resistor or idiot lamp) when the switch is off.

Can't really help much more without more information about how your alternator is wired. However, check the N-series 12v conversion drawing at www.nseries.com to see what I'm talking about in the alternator portion of the circuit.

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Jerry D in NC

11-15-2001 04:59:08

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Re: 12-volt conversion in reply to Dan Padfield, 11-14-2001 18:08:22

Assuming you used the 3 wire Delco 10si with the self contained regulator then it is probably how you have the sense line connected to the battery. There should be 2 wires in a plug in connector and one of them should be white. That would be the one I would be starting with. A quick test would be to disconnect that plug and check it with a test light with the switch off.

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