Testing 1g alternator
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Fleet Mechanic
Joined: Jun 2009
Posts: 1,320
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From: CT
Testing 1g alternator
So my alternator seems to be over charging after driving. Now I'm guessing it would be the voltage regulator. After awhile I'm getting 15volts on the gauge. Luckily i don't due to many long drives. It seems like sometimes it work sometimes it doesn't. What is the procedure to single out the physical alternator vs the voltage regulator. The regulator is a cheap advanced auto parts one 
. Next time i'll be getting a transpro. I'm also considering replacing the connector which right now is just butt connectors that someone put there vs the oem plastic connector.
. Next time i'll be getting a transpro. I'm also considering replacing the connector which right now is just butt connectors that someone put there vs the oem plastic connector.
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
I dont think its very likely that the alt is causing it to overcharge, maybe the wiring between the alt and regulator though. I'd consider getting rid of that whole mess and upgrading to a 3g setup.
Elder User
Joined: Mar 2008
Posts: 912
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From: Marianna, Florida USA
If it's definitely the regulator, too much current to the rotor. First thing to do is check the connections to make sure that the VR is seeing system voltage not dropped by a resistance to it. Then the only way to correct the problem is replace the VR. 
Thread Starter
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Fleet Mechanic
Joined: Jun 2009
Posts: 1,320
Likes: 1
From: CT
Thanks guys. My guess is the wiring too very sketchy. I'll test to voltage to the vr. What wire would that be?
I was thinking of swapping to the 3g, i guess just more parts to add to the pile sitting in my room.
*edit* So looking around it look like the test the voltage i would be looking at the black / orange wire that goes to the regulator. Furthest one to the right on the regulator.
Also i'd like to keep the 1g it looks to be the 100amp version and i can never get the voltage to drop on this thing.
I'm also going to clean my battery terminals again as look at them the positive is getting some corrosion AGAIN.
I was thinking of swapping to the 3g, i guess just more parts to add to the pile sitting in my room.
*edit* So looking around it look like the test the voltage i would be looking at the black / orange wire that goes to the regulator. Furthest one to the right on the regulator.
Also i'd like to keep the 1g it looks to be the 100amp version and i can never get the voltage to drop on this thing.
I'm also going to clean my battery terminals again as look at them the positive is getting some corrosion AGAIN.
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01, 06, 1g, 2003, 73, alternator, escape, f350, ford, hybrid, regulator, test, troubleshhoting, troubleshooting, voltage
