77 Ford F-250 overcharging

skinny_pedal · Oct 13, 2014

I've got a truck at work that has me going. It's overcharging. Tried a couple alternators and regulators. Currently has the high end Napa parts on it. I've checked my grounds and they good. I have the engine ground to block, block to body. Then off the block to the regulator. Even unhooked the battery cables and ran the truck off a jump box thinking the battery might have a dead cell.
No luck. If I unplug the regulator it sits at battery voltage running. Any ideas?

leadfoot067 · Oct 13, 2014

heres how you fix that..the ford external regs are junk..

http://www.ebay.com/itm/Tuff-Stuff-...Parts_Accessories&hash=item233f29cd8c&vxp=mtr

Totalled · Oct 13, 2014

Ford 3G swap.

http://www.ford-trucks.com/forums/942250-just-did-a-3g-upgrade.html

Or, quit using OE mechanical style regulators and use an electronic version from an 80's truck.

skinny_pedal · Oct 13, 2014

Totalled said:
Ford 3G swap.

http://www.ford-trucks.com/forums/942250-just-did-a-3g-upgrade.html

Or, quit using OE mechanical style regulators and use an electronic version from an 80's truck.

For sh*ts and giggles. When did they switch?

Totalled · Oct 14, 2014

78ish.. Some catalogs show them for 77.

skinny_pedal · Oct 16, 2014

Was the amp gauge. Strangest thing ever:wtf:

junkyard jim · Oct 17, 2014

Amp gauges do that in Jeeps too. I was also going to say to check the 4 wire plug on the regulator. 1 of the 2 middle wires burns off from corrosion and causes the alt to full field till it burns out or the regulator does.