What does the wire harness that clips to alternator go to? Please read!
07-30-2007, 01:32 AM
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What does the wire harness that clips to alternator go to? Please read! I just installed a racetronix fuel system on my 2k ls1 because the walbro blew up 
Any way I had to drop the alternator to connect the wire harness from the racetronix system directly to the alternator. I accidently pulled the little red wire from the clip on the back of the alternator..it ripped 
I thought i fixed it. went for a test drive car runs great except no voltage on gauge
1. if the fuel system wire harness does not have good ground and its hot is connected to alternator will it drain all power?
2. or what the hell is the red wire that plugs into the clipped wire on the back of the alternator...not the hot red that goes to battery...very small gauged wire that i ripped and may not have good connection from my repair?
any help appreciated
thanx
JonSSTex
Any way I had to drop the alternator to connect the wire harness from the racetronix system directly to the alternator. I accidently pulled the little red wire from the clip on the back of the alternator..it ripped I thought i fixed it. went for a test drive car runs great except no voltage on gauge 1. if the fuel system wire harness does not have good ground and its hot is connected to alternator will it drain all power?
2. or what the hell is the red wire that plugs into the clipped wire on the back of the alternator...not the hot red that goes to battery...very small gauged wire that i ripped and may not have good connection from my repair?
any help appreciated
thanx
JonSSTex
07-30-2007, 04:31 AM
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I would replace it. The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and one destination) into the PCM. The PCM applies ignition voltage to the generator L terminal circuit. A small amount of current flows from this circuit through the generator windings to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to a voltage), this DTC will set.
The PCM expects to detect low voltage on the L terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to a voltage), this DTC will set.
07-30-2007, 08:38 AM
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Originally Posted by staringback05
^^^
whered you copy that from?....
the wire you ripped is called the excitor wire, and yes you need it...it tells the car to charge the battery so go get it replaced
whered you copy that from?....the wire you ripped is called the excitor wire, and yes you need it...it tells the car to charge the battery so go get it replaced
07-30-2007, 08:56 AM
#5
mmm...the wires not called a terminal circuit...its called the excitor wire, i can get a gm catalog link, numerous other peoples post on here, or a mechanics perspective if you'd like that....
ive ripped it out, gone to gm said "i need an excitor wire" and got it right away....
ive ripped it out, gone to gm said "i need an excitor wire" and got it right away....
07-30-2007, 09:05 AM
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Originally Posted by staringback05
mmm...the wires not called a terminal circuit...its called the excitor wire, i can get a gm catalog link, numerous other peoples post on here, or a mechanics perspective if you'd like that....
ive ripped it out, gone to gm said "i need an excitor wire" and got it right away....
ive ripped it out, gone to gm said "i need an excitor wire" and got it right away....
07-30-2007, 11:36 AM
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Originally Posted by staringback05
^^^ whered you copy that from?....
the wire you ripped is called the excitor wire, and yes you need it...it tells the car to charge the battery so go get it replaced
whered you copy that from?....the wire you ripped is called the excitor wire, and yes you need it...it tells the car to charge the battery so go get it replaced
thanx again for the info
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07-30-2007, 04:23 PM
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Originally Posted by JonSS_Tex
But seriously where did u get that from?
Originally Posted by JonSS_Tex
I just went to gm and they just gave me the harness clip with a pigtail on it. not a continuous wire to pcm?
07-30-2007, 07:08 PM
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Originally Posted by LS1_TA_2002
My factory service manual.
If they sold you a pigtail then you want to solder it to the wire where it ripped off. You could use a butt (crimp) connector, but I wouldn't reecommend it. I had my alternator replaced under warranty and the tech used a butt connector and I kept getting a pending P1637 code. I finally got my *** up off of the couch and soldered it. No code now.
If they sold you a pigtail then you want to solder it to the wire where it ripped off. You could use a butt (crimp) connector, but I wouldn't reecommend it. I had my alternator replaced under warranty and the tech used a butt connector and I kept getting a pending P1637 code. I finally got my *** up off of the couch and soldered it. No code now.
I was asking where you got the info from because I could not find anything for it. 
