Won't charge
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Senior User
Joined: Dec 2005
Posts: 229
Likes: 1
From: Fargo, ND
Won't charge
Hi,
I just bought a 1978 Bronco, but I am having problems with getting the altenator to charge. I have a consistent 12.4 volts so when I use any accessories my battery will die. The altenator tested good a 3 parts stores and I also tried several different voltage regulators. But no luck. Also i trace every wire and they all look good and I checked voltage on every wire. this is the interesting part--- there was only like .33 volts at both the stator wire and the field wire. I also have a 1978 F150 so I checked the voltage on the stator and field wire on it and they were both around (i think) 10 volts, but don't remember exactly. Any advice would be much appreciated. thanks
I just bought a 1978 Bronco, but I am having problems with getting the altenator to charge. I have a consistent 12.4 volts so when I use any accessories my battery will die. The altenator tested good a 3 parts stores and I also tried several different voltage regulators. But no luck. Also i trace every wire and they all look good and I checked voltage on every wire. this is the interesting part--- there was only like .33 volts at both the stator wire and the field wire. I also have a 1978 F150 so I checked the voltage on the stator and field wire on it and they were both around (i think) 10 volts, but don't remember exactly. Any advice would be much appreciated. thanks
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
I would not pay to much attention to the F & S, check the A and I and see what voltages you are getting there.
Also make sure the regulator and alternator have a good ground.
Do you have a light or a gauge?
Also make sure the regulator and alternator have a good ground.
Do you have a light or a gauge?
Last edited by subford; Jun 3, 2006 at 10:37 PM.
Moderator
Joined: Jan 2001
Posts: 56,950
Likes: 2,718
From: Virginia
You should have;
12 volts on the "A" terminal of the regulator at all times.
12 volts on the "S" terminal of the regulator if you have the key in run, and you have a factory ammeter in the dash.
12 volts on the alternator output wire with the engine not running.
Do some of these checks and see what you have.
12 volts on the "A" terminal of the regulator at all times.
12 volts on the "S" terminal of the regulator if you have the key in run, and you have a factory ammeter in the dash.
12 volts on the alternator output wire with the engine not running.
Do some of these checks and see what you have.
