corvette alternator to fbody plug
corvette alternator to fbody plug hey i had repinned the alternator plug so that the one wire is now in the "f" terminal but now that i did that it is barely seeing 12 volts. Before when it was wired in the "l" terminal i was seeing 18 volts. i am using a fbody ecu and all the info i could find was carbed setups please any info would help
Alternator rewire I tried to put a DR44 on an '03 5.3 and wire it to the computer but it would not charge, just fail to the 13.8 volts. Once I installed the correct alternator and changed the plug back to stock it started charging again. Guess it's something to do with the alternator internal wiring.
I tried to put a DR44 on an '03 5.3 and wire it to the computer but it would not charge, just fail to the 13.8 volts. Once I installed the correct alternator and changed the plug back to stock it started charging again. Guess it's something to do with the alternator internal wiring.
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Joined: May 2007
Posts: 202
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From: Norwood,Ont canada
I have the corvette alt on my 99 f-body this is the alt I used off of a 2000 corvette it's a ac delco part # 334-1280 you don't have to re pin anything just plug it in and it works perfectly fine just like a stock f body alt. You can also get a different regular put in the alt that will eliminate the exciter wire and will self regulate its self
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Verdad Gallardo For what it's wrth, mine is a C6 alternator. Was yours purchased used? Have you had it tested? Most auto stores will do it for free. If you don't mind cutting the wire, you could try jumpering it directly to the battery, with the 470. Resistor in-line. If you still get 18.8 volts, I would think either the resistor is shorted, or your regulator is bad.
Last edited by 1981TA; Aug 3, 2014 at 08:35 AM.
Thanks guys when I get home I will pull the alt and bring it to get tested it is a new refurbished but we all know how faulty they can be lol and yea when I had it stock plug with no resistor 18.8v and with resistor 18.8v and when I changed the to the "f" terminal it wasn't charging at all
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Joined: Feb 2008
Posts: 503
Likes: 1
From: Ventura, Ca
You need to check the year the alternator came from and look at the Corvette wiring setup. If it is not using 'f' terminal then you will probably need to wire it like a Vette and program the PCM for the terminal type or at least figure out the differences based on the wiring. I went to a 04 GTO OS with a Camaro wiring and it would not charge until the setting was changed and the PCM was reprogrammed to a 'f' type charging. Same problem no charging until the change. No wiring was changed.
You need to check the year the alternator came from and look at the Corvette wiring setup. If it is not using 'f' terminal then you will probably need to wire it like a Vette and program the PCM for the terminal type or at least figure out the differences based on the wiring. I went to a 04 GTO OS with a Camaro wiring and it would not charge until the setting was changed and the PCM was reprogrammed to a 'f' type charging. Same problem no charging until the change. No wiring was changed.
I tested the alt and it passed all of them i am lost!!!!
Do you have pics of your setup?
Also, you may wish to check this reference for the correct pinout connection from your alternator to your ECU. If you are using a GM ECU, then the 470 ohm resistor will not be needed. If you are connecting the brown wire directly to "keyed positive" (or the battery, for testing), then you will need the resistor.
Also, you may wish to check this reference for the correct pinout connection from your alternator to your ECU. If you are using a GM ECU, then the 470 ohm resistor will not be needed. If you are connecting the brown wire directly to "keyed positive" (or the battery, for testing), then you will need the resistor.
Do you have pics of your setup?
Also, you may wish to check this reference for the correct pinout connection from your alternator to your ECU. If you are using a GM ECU, then the 470 ohm resistor will not be needed. If you are connecting the brown wire directly to "keyed positive" (or the battery, for testing), then you will need the resistor.
Also, you may wish to check this reference for the correct pinout connection from your alternator to your ECU. If you are using a GM ECU, then the 470 ohm resistor will not be needed. If you are connecting the brown wire directly to "keyed positive" (or the battery, for testing), then you will need the resistor.