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Old 11-24-2010, 12:15 PM
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CS130 alternator

I think I have the wiring figured out for my serpentine belt swap. I just have one question. On the original truck ('95 chevy) the plug coming out of the alt only has one small gauge wire coming out. How does it recharge the Battery?

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Old 11-24-2010, 01:06 PM
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That wire is just for your indicator light.---Also turns the alt 'on' when you start the car.

That alternator is probably internally sensed.

When I replace the plug on a JY alternator, the original plug had only the
brown wire. A replacement plug will have a red, brown, black & possibly another color wire.

I made no wiring changes to my car's installed wiring.
I did change a connector so that my harness would connect to the replacement pigtail for the CS 130 alt.

I put a 94ish small block truck serpentine system on my 454 in the 59 Elky.
I am way impressed with the charging and 'keeping up' capabilities of that cs130 alternator-----way better than the alt I had on it.
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Old 11-25-2010, 02:43 AM
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yep.. some CS130's didn't use an external sense wire.
I don't think it's actually _Require_ on any cs130, but I might be wrong there.

the replacement pigtail I bought in the parts store had two wires.. a heavy wire for the sense wire IIRC. .and a lighter duty brown wire for the warning light.

I ran the warning light wire right to my existing wire in the car's harness, the sense wire I ran over to the junction post where battery power connects with the alternator, and the car feeds almost all of it's power from.

I re-wired my car slightly because I didn't like having wires by the headers...
I ran an 8ga wire from the battery across the front of the car, and up the driver's side fender to the junction block on the horn relay by the brake booster.
then I ran the purple solenoid wire FOrWARDS around the fuel pump and up the front of the block, behind the water pump and back along the intake along with the other alternator wires...
the 10ga from the alt runs straight back along the intake to the firewall and up to the junction block.. as does the 'sense' wire.
and I cut the warning light wire from the regulator behind the driver's head light and re-routed that to the alternator
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Old 02-24-2011, 07:30 AM
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I'm not sure which wire is my dummy light wire so I plan to in stall a resistor instead. Can I install the resistors in line with any 12v powered source?
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Old 02-24-2011, 10:03 AM
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it will be the brown one.

use a test light to ground each wire until you find the wire that makes the dummy light glow and you are all set.
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Old 02-24-2011, 12:21 PM
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Thanks I got it, so far so good.
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