Hello everybody, I have been having alot of problems with the battery in my 65 draining. About every month I have to get the battery recharged. It is only a few months old, 835 cranking amps. I put a brand new voltage regulator in, hoping that would solve the problem, but it still drained after a month. So now, I removed the alternator and took it down t checker and it tested out great. I did notice some of the wires coming off the alternator wiring harness were pretty bad looking. I am going to fix these. I have a question about one of the wires. Alright, there are 3 wires coming off the alternator harness. One connects on the alternator where it says STA (starter). Another connects where it says FLD (field). Now there is one more which is black and it had been cut off by somebody else. I need to find out why it was cut and where it should connect? Is is a ground wire? There was already a seperate ground wire connected to the alternator as well as the battery wire. Thanks for any info on this. I just need to make sure that all the wiring is good and maybe this could be a reason for the battery getting run down.

 

I have a black wire with a red stripeon mine and it is a ground wire. I don't think it would change things but mine is a 69

 

Maybe one of these will help.

http://www.electricalrebuilders.org/...sicsford1g.pdf

http://midlife66.com/wiring/wiring.html

 

hiya,

just as a quick test if you have a voltmeter
1. engine off, ignition off with charged battery. how many volts do you read between battery + and battery -
(should be around 12V)
2. engine running, how much do you measure now? should be in the ballpark off 12.8-13.8V

if that's the case then the alt seems to charge fine (this is _not_ a 100% valid test, but should give us an idea)
Please make sure as well that your alt belt is tight. i mean tight:
with engine off make sure engine STAYS OFF test the following.
look at the alternator belt. where you have the longest distance between the pulleys grab the belt with thumb and middle finger.
you should be able to turn the belt by 90degrees over it's own axis max. this done with considerate power but not brute force ... hard to explain ... ;-) if you can turn it easy half turn or more tighten up that belt.

 

STA is stator not starter. The wires go to B+(red), field (white) and ground. Anything that's black is a ground. If you have one attached to the alt already the one with the cut off terminal goes to the engine block as a master ground point.

Ps: good tip Kalli!

JLG