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620 one wire alt


jimmy dale

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ok i got it in had to cut the bracket

used the 2 bar system as shown by other post

when i put the battery in one of the excisting wires had power so i hooked it to the alt /

lined up runs good all done and the lights are still dim

what else do i need to do

i am takeing it to napa tomorrow to have it tested for how much charge

i will let you know

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the one i got from z theropy, just ran batt cable directly to battery, another heavy ga wire to ground. using factory wire u need jumper wires on volt reg plug like shown on dime quarterly. but truck wiring is different. remember,it need right rpm to switch on the gm unit. something over 800rpm, if i remember right.

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ok got it had to ground the alternator to three things just for future reference:

6 wire regulator 620 red/white, blue/white wire together, yellow and white wire together, black wire has to be grounded to the battery. white wire with blk stripe unhooked.

 

alternator: white wire/red stripe hooked to the back of alternator, alternator is grounded to frame and battery.

 

it runs and charges no bogging down when lights and heater are turned on.......

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Sounds like your ground was non-existent, so make sure both the block and body are grounded. the alt is least of yo problems for poor ground, burning the wiring is worst case.

 

1 Neg battery cable to block

2 neg batttery wire to body, usually to horn bolt

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ok well the only thing not grounded is the winshield lol

seems to be working fine will have to build a tightner keeps working belt lose and wont charge

might try the turnbuckle idea

but now i will be putting a slave cylinder on it only comes out half way and lost clutch hopeing i dont have to replace clutch yet or i will go with the 5 speed trans and rearend

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