Bs3 alternator issues?
Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 58
Likes: 0
From: Dallas Tx
Bs3 alternator issues? I'm fairly certain the factory PCM commands the alternator on and controls some of the charging functions of the alternator. I'm running a bigstuff3 system on my lq9 and a factory truck front accessory drive. I guess what I'm getting at is how am I gonna make the alternator come on if the bs3 system doesn't command it on?
On The Tree
Joined: Feb 2009
Posts: 130
Likes: 0
From: san antonio tx
i am working is the same issue ,, and what I found is that you can run a 12V+ wire with a 500 resistance in line , plus the regular big wire that goes to the junction box and another 12V constant,, I am still working on the where they go on the alternator, once I get it clarified I will let you know.. or do a search with " alternator wiring" maybe it will make more sense to you than it did to me good luck
Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 58
Likes: 0
From: Dallas Tx
OkPOl here's what I'm gathering from a discussion on ls1tech that I googled. Pin b needs to have a resistor that's 500ohms of resistance inline and ran to a 12v sourcethe resistor should step voltage down around 3.5 to 4 volts. Pin c needs to be a switched 12v fused source. S&p has a diagram on their website as well but they're saying to use a bulb?? I think I'd prefer coil resistor as opposed to a bulb...
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Pin B does need to go to either a 470 ohm 1/2 watt resistor (or a light bulb) and then to a switched +12V source.
Pin C needs to go directly to a +12V switched source.
Pin C needs to go directly to a +12V switched source.
