'94 lt1 alternator question.
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Joined: May 2000
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From: Tucker
'94 lt1 alternator question.
I had to replace my alternator today and when I disconnected the regulator plug the old plug crumbled into plastic shards in my fingers.
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
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Joined: Aug 2002
Posts: 99
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From: Lake Jackson TX
Funny this is posted.
My ALT pigtail crumbled when I pulled the engine out last June. I have my new 383 installed and I will be wiring up the pigtail today after work.
This info will be handy.
BTW: Does anyone know when the ALT is unplugged if the computer will keep the starter from turning over? I can't get the starter to engage with the key. If I jump the starter it fires and runs. I'm hoping once I fix the ALT wiring the starter will work.
My ALT pigtail crumbled when I pulled the engine out last June. I have my new 383 installed and I will be wiring up the pigtail today after work.
This info will be handy.
BTW: Does anyone know when the ALT is unplugged if the computer will keep the starter from turning over? I can't get the starter to engage with the key. If I jump the starter it fires and runs. I'm hoping once I fix the ALT wiring the starter will work.
Le Mans Master
Joined: Apr 2001
Posts: 7,410
Likes: 252
From: Little Elm TX
Originally Posted by Chris Harkins
I had to replace my alternator today and when I disconnected the regulator plug the old plug crumbled into plastic shards in my fingers.
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
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Joined: Mar 2005
Posts: 666
Likes: 0
From: Walton KY
I have a 94 LT1. When I got the car the alt was shot, so I replaced it. Like a fool I did not disconnect battery and shorted something out in the wiring harness for the regulator. I installed a self exciting alt with no SOS lights coming on. The only drawback, at traffic lights with trun signal on, the amp guage jumps up and down and the headlights dim a little.
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Le Mans Master
Joined: Apr 2001
Posts: 7,410
Likes: 252
From: Little Elm TX
Originally Posted by Chris Harkins
I had to replace my alternator today and when I disconnected the regulator plug the old plug crumbled into plastic shards in my fingers.
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
I have a new plug now and think I remember the correct pin-outs for it.
To make sure I get it right does anyone know the correct order for P L I S?
any sure fire test to make sure I get it right?
Thanks in advance.
-Chris
Hope that helps.
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Joined: May 2000
Posts: 85
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From: Tucker
Thank you all for the replies.
I went out for another look. Found the 10 AWG red wire can't miss it. It's S and in the harness it connects to the positive battery terminal. The alt uses this to sense if a batt is connected and at what voltage. The next wire was light brown and connected to I (sometimes labeled F ) the last wire was black or dark brown and connected to L.
I'm not sure the order but L and I feed the volt meters in the dash and the BATT light too.
As stated above P is unused.
I wanted to solder and shrink tube the connections but there is so little room in there. I went with Posi-Lock connectors. They use an ice cream cone shaped screw in plug to hold the wires and I was pleased with how well they grip the wires.
I found the pigtail at Autozone on an end cap. PN 85854 by "conduct-tite!"
Many thanks.
-Chris
I went out for another look. Found the 10 AWG red wire can't miss it. It's S and in the harness it connects to the positive battery terminal. The alt uses this to sense if a batt is connected and at what voltage. The next wire was light brown and connected to I (sometimes labeled F ) the last wire was black or dark brown and connected to L.
I'm not sure the order but L and I feed the volt meters in the dash and the BATT light too.
As stated above P is unused.
I wanted to solder and shrink tube the connections but there is so little room in there. I went with Posi-Lock connectors. They use an ice cream cone shaped screw in plug to hold the wires and I was pleased with how well they grip the wires.
I found the pigtail at Autozone on an end cap. PN 85854 by "conduct-tite!"
Many thanks.
-Chris
Last edited by Chris Harkins; May 31, 2005 at 11:26 PM.
