Alternator Wiring Issue...need help
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Have a 79 elco with 2004 5.3 Silverado Vortec. I have already replaced one alternator, and rewired to what I THOUGHT migh be correct. However, battery needs charging consistantly, and car dies immediately if positive is disconnected.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
#2
LS1Tech Sponsor
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Have a 79 elco with 2004 5.3 Silverado Vortec. I have already replaced one alternator, and rewired to what I THOUGHT migh be correct. However, battery needs charging consistantly, and car dies immediately if positive is disconnected.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491
#3
LS1Tech Sponsor
iTrader: (5)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Have a 79 elco with 2004 5.3 Silverado Vortec. I have already replaced one alternator, and rewired to what I THOUGHT migh be correct. However, battery needs charging consistantly, and car dies immediately if positive is disconnected.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
Trying not to have to do this again, I have a come to the trusted experts once again. Back of alternator wired to starter. On the plug top HOT wire to battery (S on alternator), and taped wire (I on alternator) hides a 470 Ohm 1/2 watt resistor wired to idiot light. L and P on alternator inactive. Although I have looked at numerous diagrams, have I wired incorrectly? And If so and I fix it, will alternator work or have I shot this one too? Same thing...will I need to replace resistor?
Thanks in advance for any help.
Jon
PSI
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic84531_2.gif)
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
![](https://ls1tech.com/forums/signaturepics/sigpic84531_2.gif)
Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
#4
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Sorry for not explaining earlier....this is a carbed unit. There is no pcm on this car. Also, I took the resistor out, and while car is idling, still read 12.2 volts across battery. Not sure if resistor could have damaged alternator, or if I have something else wrong.
#5
LS1Tech Sponsor
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The only time a resistor is used is on a carbed setup or a 1998 and older lsx/ltx stand alone setup.
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491
#6
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
got it figured out...the exciter was wrong...had to go to "L", then put in resistor, and wired to wiper circuit...idiot circuit was dead...imagine that. thanks all for the help!
#7
LS1Tech Sponsor
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Awesome! I just assumed that you had it in cavity B for the L terminal. Its always the simple things!
__________________
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491
![](https://ls1tech.com/forums/signaturepics/sigpic241851_3.gif)
Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491