1 wire alt and oem front harness - Team Camaro Tech
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post #1 of 4 (permalink) Old Apr 10th, 13, 10:10 AM Thread Starter
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Garry
 
Join Date: Dec 2007
Location: Stanley, NC
Posts: 37
1 wire alt and oem front harness

Need a little advice. I am converting to a LS3 with the Vintage Air Frontrunner. Of course it came with a one wire alt. I was looking at the Mad electrical web site and was going to try the setup that has you run the alt output to a connection that is in the harness. I will then run a wire from the connector to the starter lug and then the battery wire will provide the charge path to the battery. I think Mad calls it the New Setup or something like that. My question is what do I do with the OE harness alt connection and the white, blue and brown wires that are in the harness. Just looking at things, it looks like I can remove the blue and white wire for sure, also the OE alt red wire output can also be deleted, but I do not know about the brown wire that goes back into the bulkhead fitting, back into the interior. I think it goes to the alt light on the dash, but does it do anything else? Does it provide any other function in the harness? I know that if I had it to do again, I would have tried harder to get a 3 wire with the front runner, and just made things easier, but I got what I got. Any advice? Thanks DZ434

AKA "Garry" 69 RS LS 376/525, 12 Bolt 4:11, DSE QuadraLink, T56 Magnum Transzilla Rockland Standard Gear
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post #2 of 4 (permalink) Old Apr 10th, 13, 10:29 AM
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Steiner
 
Join Date: Mar 2009
Location: Lyman, SC
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Re: 1 wire alt and oem front harness

You can just unplug the old voltage regulator and connect the one wire's connection either directly to the battery or to the horn relay bus bar. If doing the latter your factory ammeter will still function but you might want to upgrade the charge wire between the horn relay and battery. One of mine is wired the first way, the other with factory guages is wired the second. If you want to retain the gen light (non gauge car) I'm not 100% positive but there may still be a pin on the alt you can connect to. Also if you use an actual F body or similar alt the small charge wire that controls output is controlled by the PCM so it can be an ordeal getting it to charge right.

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Last edited by Steiner; Apr 10th, 13 at 10:47 AM.
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post #3 of 4 (permalink) Old Apr 12th, 13, 04:49 PM Thread Starter
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Garry
 
Join Date: Dec 2007
Location: Stanley, NC
Posts: 37
Re: 1 wire alt and oem front harness

Thanks for the reply. I talked to the folks at Powermaster about the 1 wire and feel a little better aout the 1 wire. He suggested that I run a # 4 wire from my alternator output harness connection to the starter lug. That way the voltage drop to the battery would be minimal. I am making my harness connection between the Horn relay and the interior fuse box. I will run # 8 from the connection point to the horn relay and use the orginal wire going to the fuse box with the fusable link. Hope to have it powered up in the next few weeks. If I am not happy with the voltage, I am going to go back to the 3 wire voltage sensing setup. the folks at Powermaster said #47461 would work fine on the vintage air frontrunner. We shall see. Thanks again for the reply

AKA "Garry" 69 RS LS 376/525, 12 Bolt 4:11, DSE QuadraLink, T56 Magnum Transzilla Rockland Standard Gear
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post #4 of 4 (permalink) Old Apr 29th, 13, 06:04 PM Thread Starter
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Garry
 
Join Date: Dec 2007
Location: Stanley, NC
Posts: 37
Re: 1 wire alt and oem front harness

Got the car running. Voltage at starter is solid 14v at idle. So far very happy with setup.

AKA "Garry" 69 RS LS 376/525, 12 Bolt 4:11, DSE QuadraLink, T56 Magnum Transzilla Rockland Standard Gear
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