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Old 10-27-2004, 06:42   #1 (permalink)
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confused 1965 Galaxie alternator question????????

My father gave me a 1965 Galaxie 2 door with a 289....well all things aside the car runs great stock everything but the problem I am having is the the batery will not charge. He told me that he put in a new alternator and voltage regulator and I think the battery is new also. I only measure 7.8 volts on the battery when the car is running witch is way below what I think is should be. I found something on the internet that if I jumpered out the A and F terminals on the plug that plugs in the voltage regulator that I should read max voltage output across the battery...I pulled the terminals off of the battery cleaned the put them back on it showed a charge of 13.8 volts....GREAT :)....But then took the car down the road then pulled it back in and shut it off tried to start it again and the battery was dead???? :( ....took the battery to Advance auto and had it checked out...they said it tested out fine..I have no idea where to turn
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Old 10-28-2004, 19:47   #2 (permalink)
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Re: 1965 Galaxie alternator question????????

if you have screw on cover on the regulator, you can take the cover off and check it out- with the engine running the single contact relay should be 'on' to activate the field, and the other double set of contacts adjusts the field current. with a voltmeter on the battery(and at least low fan or some lights on to pull a little current), if you press on the double contact, voltage should drop(low/trickle current), if you pull it between the two contacts voltage should increase (mid current), and if you pull it to the top contact, voltage should really go up(max current).
Note the relay contacts and frame around them are NOT AT GROUND, so keep metal away, and use only light pressure on the double contacts- the spring tension sets voltage cutoff level, you probably wont want to change that.
If three steps in the current arent seen, one of the little wirewound resistors on the bottomside of the regulator might be bad- if only the 'max' current is working, it might not start charging until battery is really really low, then it may cutout at the midpoint- before battery is fully charged.

If it aint the regulator, you might want to just unplug the cables at the base of the cowl that plug thru the firewall into the back of the fuseblock- if any are corroded(it is 40 yrs old) a bad field power or ground may be screwing things up intermittently. Bad grounds can do weird things, you might want to just remove any grounding ring terminals you can find, clean off any rust, put some new screws in any that look questionable. A bad ground in my lincoln was messing up my dash lights, but also burned the fuel level sending unit up-wirewound portion was burnt in half inside the tank...lucky there isnt much air in there!
Good luck-
Confidence: that feeling you have just before you realize the mess you've gotten yourself into...
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