did a v6 to v8 swap. during the swap my friend snipped a few wires that i have no idea where they went.

my alternators ( i tryed 3 and they all tested fine on my other car) wont charge so i figure its a wiring problem

its a 91 z28 alternator wiring. i looked all over online bt i can not find what the wires do on the alternator. gauge work so i guess thats wired up fine.

does it need key on power to any of the wires?

honestly if i get a diagram of the cnnector i can figure it out i cannot find it anywhere on the internet!

any help is appreciated!

 

Yeah you need to have a 12V ignition source as your exciter wire. I had the same problem.

 

http://www.austinthirdgen.org/index.php?pid=19

it is a cs alternator, you can run a wire from the bat terminal to the exciter

http://www.pirate4x4.com/forum/showthread.php?t=207958

 

Won't wiring it to a constant 12v burn the alternator up?

Yeah, don't wire it straight to the battery. "Caution: if you connect a full 12 volts to the "L" terminal without the resistor it will cause the voltage regulator to fail"

http://www.alternatorparts.com/GM_De...ng_diagram.htm

 

no it wont burn it up, the exciter usually gets its power from the ignition switch. I have done this on cs and si with no issues.

 

http://www.summitracing.com/parts/PRF-30707/

the white wire would be for the idiot light.

 

Well I guess I could be wrong but I think it'll burn up if you leave it connected to a constant source of power, which is why it's connected to an ignition source with a resistor. My brother law has burned a couple up running them to constant hot sources in his drag cars and demo cars.

 

On the linked pigtail - red wire with the eye terminal goes on the batt+ post, the white (brown on the attached circuit) goes to switched ign thru a resistor/idiot light.

 

thanks everyone. i have it wired up right. but i guess my 12v ignition on may have fried or i mis read the multimeter.

i got big red to batt. what are the other 2 wires for? i believe i hooked the white to 12v key on. but there is still 1 wire left o.0 ?

 

Did you read my post?

 

yes but it looks like there is only 3 used. the big 12 v then the 3 wrie connector. the diagram is only showing 2 of the wires on the cnnector being used

 

Sorry man, i assumed you had an si alt - do you have a cs? Never used one myself, besides the main output stud they have 4 terminals S, L, F and P.

In addition to Awesome's link up in post 4, this explains the terminals pretty well (on the second page):

http://www.alternatorparts.com/cs130_sbpage1.htm

 

good info to know !!!

 

okay so what it says is all it needs is L to be 12 v source and the main wire to batt. i thought i did this . the alternator worked for 2 minutes then no voltage at all? what could be frying the alternator?

 

okay i have l linked to a 12v source. f isnt connected to anything and s is going to the battery.

no alt output. i took a 12 v source off a relay. and even tryed a battery cahrger to pwer L still no power. the s power take on or off dosnt do anything. ad the main supply to the batt is hooked up.

i dont get it. this is the only thing holding me up from finsihing it. brand new alternator. worked for a minute then nothing after that. went back to autozone and it tested okay. wtf!!!!!

 

im stumped =[ is the alternator triggered by the computer?

 

S- sence wire, f- Ingintion , L- alt light , p- nc

 

NO, you just need to hook up F and S and the bat wire

 

thanks for the info. i was hooking up L to 12 v key on( because the diagram looked like L went to 12v key on). and i guess it fryed the alt because i went back to autozone a 3rd time and it fails.

now i got a new alt. and going to try wiring it up again. due to wrok scedual i wont be able to try it till sat. so il give an update then.

 

don't let the smoke out of this alternator, Good luck !!!

 

okay 3rd genners thanks for all the help i believe i found the problem.

as always people forgetto include data like me.
when i fryed the new alt it happened when i hooked up the fan. i kept the ground hooked up to te cmputer and gave the black/redstriped wire 12v key on.
car ran and once i turned key off and out it stayed running for approx 30 seconds.

this may have causes a spike through the systems. new alt in wired the same minus the fans and it charges like a champ!.

now should i wire up the fan to a swtich then lol?