76 F250 Voltage Regulator Problems
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From: Cab of a truck
76 F250 Voltage Regulator Problems
76 F250 4x4 390 Electronic Ignition
I'm totally lost when it comes to electrical
I just replaced my alternator and voltage regulator, but I had to put new ends on the connectors that go to the back of the alternator and somehow crossed the field and battery wires and it toasted the new VR. My new alternator tests ok but the VR didnt, I'll get my new one tomorrow. I only have 3 wires going to the VR, the 3 terminals that are closest together, and nothing going to the top one. I'm not sure if it has always been this way as I've never messed with the VR on this truck before. My 68 Torino has the same VR but has a plug with all 4 wires going to it. I'm wondering if there wasnt supposed to be a wire going to the top terminal on the VR in the first place or if the wire dissapeared and thats what killed my old alternator.
Any help is appreciated, thanks.
I'm totally lost when it comes to electrical
I just replaced my alternator and voltage regulator, but I had to put new ends on the connectors that go to the back of the alternator and somehow crossed the field and battery wires and it toasted the new VR. My new alternator tests ok but the VR didnt, I'll get my new one tomorrow. I only have 3 wires going to the VR, the 3 terminals that are closest together, and nothing going to the top one. I'm not sure if it has always been this way as I've never messed with the VR on this truck before. My 68 Torino has the same VR but has a plug with all 4 wires going to it. I'm wondering if there wasnt supposed to be a wire going to the top terminal on the VR in the first place or if the wire dissapeared and thats what killed my old alternator.
Any help is appreciated, thanks.
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Not to worry ...There are only 3 connector tabs used
See Figure # here.
http://www.autozone.com/servlet/UiBr...3d800ce982.jsp
See Figure # here.
http://www.autozone.com/servlet/UiBr...3d800ce982.jsp
Last edited by Mil1ion; Nov 6, 2006 at 09:43 PM.
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From: Cab of a truck
With everything working right, how many volts should I have at the red post on the back of the alternator with the motor running? When I had the wires crossed on the alternator I was getting 19-20, but when I put them where they belong I had about 11, and then had the VR tested and i'm thinking thats why.
Last edited by FordPickup460; Nov 7, 2006 at 01:04 AM.
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When your battery is fully charged and the truck is running at ~1000RPM you should have 13.8-14.2 VDC at the battery terminals.
With the older voltage regulators people could adjust the voltage. On those systems I liked to run at the high side of those specs for a short-trip stop-and-go vehicle and nearer the low side for a highway driven vehicle. The new solid state regulators are not adjustable.
I did jack up one little old ladies regulator to 14.5VDC to keep her battery charged years ago. She drove her car twice a week for about 3 blocks each time. Once each to church and to the grocery store.
With the older voltage regulators people could adjust the voltage. On those systems I liked to run at the high side of those specs for a short-trip stop-and-go vehicle and nearer the low side for a highway driven vehicle. The new solid state regulators are not adjustable.
I did jack up one little old ladies regulator to 14.5VDC to keep her battery charged years ago. She drove her car twice a week for about 3 blocks each time. Once each to church and to the grocery store.
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