OmenNova

I have a question that has been beat to death, but I can't seem to figure out the final verdict of what people are doing recently. I got my Nova swap running, but the alt isn't charging. It's a C5 GMPP kit and has the SFL terminals. I wired 12v keyed to the L wire through a 194 build holder I had. The alternator won't charge. It also won't charge if I add 12v to the F wire. S is ran to the battery post on the back. I know 12v is supposed to burn up the L wire but I tried it very briefly just to see what would happen. If I touch 12v to it, it jumps up and charges 13.8 but won't work with the resistance method. Also there is a black line on the L part of the alternator like someone marked it from factory, not sure why. I don't want to burn it up obviously but I can't find any recent threads that addresses this either. Opinions?

OmenNova

Also the alt part number is 25888970

Pop N Wood

iTrader: (1)

Take it to a parts store and have it tested

OmenNova

It has to be good though doesn't it? For the split second I applied 12v to the L terminal it charged.

CBM Motorsports

iTrader: (2)

What resistor did you try using? It has to be a certain one or it wont work.

OmenNova

The resistor I tried probably wasn't right, it's just one I had laying around from some autometer gauges. The 194 bulb is what I initially tried though, seemed to be a common solution in a lot of threads. Is it possible the bulb reduced too much and didn't activate it? May just have to order the 470ohm.

BigBadWhitey

iTrader: (3)

Any idea what voltage is suppose to be ran through the L wire?
I seem to be the other way - im worried my alternator is always charging. Any good way to tell?

OmenNova

Everyone says the L wire should have 5V

Pop N Wood

iTrader: (1)

You are going to be really mad at yourself if you go through a bunch of effort only to find the unit was bad.

70 Bug Mid Engine

This is the one I know for a fact works. And it goes in this location on the connector.

OmenNova

I messed around with it some yesterday and used a different bulb socket. Inline with the L terminal the alternator now charges fine. Just an issue with the holder I was using I guess. The bulb does stay lit up though once I start the motor at idle. I assumed it should go out but doesn't.