My race car had an older heavy 10SI type alternator. Simple 3 wire setup. Main post is hot to the battery. Red wire on the 2 wire plug goes to the hot post. Brown wire goes to ignition side for field.

I'm trying to install a newer smaller style alternater. Main post is still hot but I now have a 3 wire plug. Red wire, easy guess, goes to hot post. The 2 other wires are brown and brown with a white stripe. I'm guessing these are the field wires but every combination I've tried in hooking them up, won't let the alternator start charging.

This is one of those alternators that you can't pull apart and rebuild. I'm taking it in to the parts store tomorrow to get it tested to see if it actually works. If not then I give it back to the junk yard. It was off a 89 Cavalier.



------------------
Follow my racing progress on Stephen's racing page
and check out the race car

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

 

Bad alternator. The 5th one I picked up finally worked.