What is this connector for?

[Klassen]

Does anyone know what this connector is for with the brown wire? I tested it with my multimeter and it's switched 12v which is what I'm looking for to wire my LS swap alternator.

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[Supercharged111]

Don't use any old wire to power the alternator, use the correct wire that's already there for that application. The single wire pictured might be for the optional solenoid for the second battery?

 

[Klassen]

I'm running a Terminator x so there is no correct wire already there.

 

[xXxPARAGONxXx]

Well, where is that harness from (year/model)?

 

[Klassen]

It's a 96 c1500.

 

[Supercharged111]

Yes, there IS a correct wire still in there from GM all properly sized and fused. I suspect it's on C100, the big rectangular plug bolted to the firewall right near where that brown wire is.

 

[GoToGuy]

What was it connected too? Is this an LS engine swap or an LS alternator swap? And your using the OE wiring diagrams in section 8 right?
There is a bazillion LS swap diagrams guides on net, have looked at any?

 

[Klassen]

Simple question. What is the connector for? All other information is irrelevant. It was never plugged into anything on my truck

 

[Supercharged111]

Simple question. What is the connector for? All other information is irrelevant. It was never plugged into anything on my truck

So now you're just determined to half@$$ this alternator wiring. Here is the mystery wire in its intended home.

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[Klassen]

So now you're just determined to half@$$ this alternator wiring. Here is the mystery wire in its intended home.

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You don't know what your talking about. The alternator needs connection to positive battery terminal and 1 switched 12v reference with a resistor. I don't see how giving the alternator exactly what's required is half assing anything.