alternator wire help
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Fleet Mechanic
Joined: Aug 2009
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From: Western Washington
alternator wire help
It looks like I've made a mistake, I forgot to mark the alternator wires when I took it apart... Now I'm stuck, and I can't figure out where the wires go. I just took this picture, maybe someone can help me match the terminal to the wire...
Thanks
Sam
P.S. There's more terminals than there are wires, is that something I should be concerned about?
Thanks
Sam
P.S. There's more terminals than there are wires, is that something I should be concerned about?
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It should be there...
Do you have the dash with gauges or idiot lights?
With gauges the wire should be there. Otherwise you could run a new wire from the Stator terminal to the S post of the regulator.
Josh
Do you have the dash with gauges or idiot lights?
With gauges the wire should be there. Otherwise you could run a new wire from the Stator terminal to the S post of the regulator.
Josh
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Fleet Mechanic
Joined: Aug 2009
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Likes: 9
From: Western Washington
I've got gauges, the only lights on there are for high beams, brakes and turn signals.
Where is the S-post on the regulator? Is it one of the clips, or...? Sorry for so many questions, I don't know much about electrical stuff.
Sam
P.S. Is the missing wire a must have for the alternator to work properly?
Where is the S-post on the regulator? Is it one of the clips, or...? Sorry for so many questions, I don't know much about electrical stuff.
Sam
P.S. Is the missing wire a must have for the alternator to work properly?
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It's the post marked STA on the back of your alternator and no it will not work properly without the wire. The wire goes directly to the S post on the voltage regulator.
If the wire is still in the harness it will be white with a black stripe.
And don't worry about the questions, it's what we are here for. And once you get this nailed down you'll, in turn, be able to help somebody else.
Josh
If the wire is still in the harness it will be white with a black stripe.
And don't worry about the questions, it's what we are here for. And once you get this nailed down you'll, in turn, be able to help somebody else.
Josh
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Fleet Mechanic
Joined: Aug 2009
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From: Western Washington
Ok, I found the S post, so should I just solder the stator wire to the wire coming plugged onto the S-post? There was no white wire anywhere in the area, a few yellow ones (I'm pretty sure they were yellow to begin with, not just yellowed over time.) Looks like I'll have to run a new one.
There was something else too, there's no wire for the F post on the regulator, there's a spot in the connector, but no wire in it.
Sam
There was something else too, there's no wire for the F post on the regulator, there's a spot in the connector, but no wire in it.
Sam
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From your picture, the orange colored wire with the red cap goes to the F terminal of the voltage regulator.
Did you just get this truck? Sounds like the wiring has been seriously hacked into for some reason.
Josh
Did you just get this truck? Sounds like the wiring has been seriously hacked into for some reason.
Josh
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Fleet Mechanic
Joined: Aug 2009
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From: Western Washington
This is the same one I've been working on for awhile. I just went out and double checked it, and its the l post that has no wire, not the F post, the F post has the dark orange wire like you said. Looks like I got them mixed up somehow...
Sorry about that! But, then what is the l post for and why doesn't it have a wire? And before I solder the stator to S post wire, there's is one wire that plugs in there its green-ish yellow with a red stripe, should I just solder the stator wire into that one?
Thanks
Sam
P.S. The truck did have an engine swap a number of years ago (1984 or 85 I was told) so mabe that could account for the missing stator wire.
Sorry about that! But, then what is the l post for and why doesn't it have a wire? And before I solder the stator to S post wire, there's is one wire that plugs in there its green-ish yellow with a red stripe, should I just solder the stator wire into that one?
Thanks
Sam
P.S. The truck did have an engine swap a number of years ago (1984 or 85 I was told) so mabe that could account for the missing stator wire.
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No, at the battery would be the best place. You can check both, at the + of the battery (or solenoid post) and the alternator to see what difference, if any exists.
Check at idle and with a fast idle (1500+) with lights off, no heater and then check again with lights on and heater on hi. This will check the running voltage of the alternator and what load is placed on it with accesories running.
Josh
Check at idle and with a fast idle (1500+) with lights off, no heater and then check again with lights on and heater on hi. This will check the running voltage of the alternator and what load is placed on it with accesories running.
Josh
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