ok i swapped engines in my camaro and the alternator i have now is different than the one i used to have. there is only a red and a white wire comming out of my new alternator, but the hookup from the car itself has a red yellow and black wire. anybody know what i can do to hook this up

 

I assume you have a 10SI alternator. A large red wire and a plug with 2 smaller wires. Small red is power. The other wire (usually brown) is the field wire.

If you have a newer style alternater with a weatherproof plug then you'll have to check to see what the wires do. One should be marked with an F. That's the field wire required for charging. I don't know what the other wires on the plug are for. I've seen plugs with up to 4 wires on them.

You could just plug it in and see what it does but it may blow the alternator and the newer ones are not rebuildable without unsoldering a bunch of stuff to disassemble the alternator.

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87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block (times are for the current engine)

Best ET on a time slip: 11.447 altitude corrected to 10.99
Best MPH on a time slip: 119.42 altitude corrected to 124.86
Altitude corrected rear wheel HP: 493
Best 60 foot: 1.586

Racing at 3500 feet elevation with a typical race day over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

lol thats the thing though i cant just plug it in and see what happens.

ive got a plug in on my alt thats got 2 wires on it. red and white.

and the hookup from the car has got a connector with 3 wires on it. big red, smaller yellow and small black or brown im not sure.

the 2 connectors wont connect they werent made for each other. so ive gotta rewire them together myself but i dunno what goes where and im afraid of screwing things up.

thanks