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Delco remy Alternator

F

farmer boy

Well-known Member
i have an alternator off a 1990 gmc pick up that I would like to put on a tractor but can't quite figure it all out. It has 3 wires plus the output stud. Looking at it from the rear it is a 12 ga red wire to the left, then a 16 ga red w/blk stripe and a 16 ga black. I assume one is to the key and one is for voltage sensing but which one and what is the 3rd one for? Also what is the ideal rpm for a 10si. This one that I want to replace is 37 amp but can't keep 28 amp going at even 12 volt. It drops as low as 10 volt with 28 amp load.
 
What a great site. I may have used this style of alternator if I had found this. I will in the future, quite certainly.

Aaron
 
from your 2 prong plug small wire is keyed/switched power source, big wire goes to the stud on the alt. and charging wire also goes to this stud,, napa, ect. should have a harness with a diode already installed if needed
 
I thought I had this thing wired correctly but now I"m not so sure. I have the 12 ga wire(S) hooked to the main output stud on the alternator and (L)is hooked to the key switch(acc) with an idiot light between it and the key switch. Is this correct? I was reading that (f) should be used instead of (L) with the idiot lamp in there.
 
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