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Old 06-21-2018, 11:59 AM   #3
dave`12
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Join Date: Sep 2015
Location: Lake Placid florida
Posts: 599
Re: Alternator draining battery?

Test light tells me I have a drain.

First I did a diode test from a utube video. battery disconnected.
.810 with + on case and - on btty post
ol with - on the case and + on the bty post

So, I'm thinking the diodes are good?

The other tests:

battery 12.45v

Key off

Btty post of alt 12.45v
post 1 12.45
post 2 .7mv


Key on

Btty ost of alt 12.45
post 1 12.40
post 2 11.98

Just for fun, tried it with the engine on:

btty 14.4
btty post of alt 14.9
post 1 14.9
post 2 14.5

I also removed the - lead of the btty with the engine running and the engine did not die.

So does this mean that I simply got these 2 wires reversed (I hope)?

Oh, the engine has been turned on some 15 times since the conversion and has always shut right off with the key.

thanx again
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