What is the purpose of the resistor in the 10si alternator. I have two 10si alternators opened. I find one has the resistor and the other on does not have the resistor.
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
10si alternator resistor
- Thread starter wazzabie
- Start date
rampage
3/4 ton status
Just a guess, but the alt needs to see some sort of resistance to excite it. The bulb/gauge usually provides that resistance but if it burns out then that resistor excites it. I could be wrong though, wouldn’t be the first time. 
could the difference in a 1 wire vs a 3 wire 10SI
Should I include the resistor or keep it removed in the alternator rebuild?
I have two alternators:
1. Bad bearings; electronics are ok, no resistor
2. Good bearings, some thing is wrong electronically , with resistor
I would like to swamp the electronics from #1 to #2 alternator.
I have two alternators:
1. Bad bearings; electronics are ok, no resistor
2. Good bearings, some thing is wrong electronically , with resistor
I would like to swamp the electronics from #1 to #2 alternator.
go for it. How many wires are you using ?
3 wires
should be fine
The internal resister makes sure the idiot light works if the brushes are gone in the alternator. You probably aren't using an idiot light, and if you are making a 1 wire, leave it out.
No idiot light. The K5 came with a voltmeter.
I'm going with the stock 3 wire 10si setup. Should I include the resistor? The alternator has about 30K miles on it with no resistor.
