Check Charging System Light!!

Mr.Stang08 · November 20th, 2009, 11:37 PM

I was warming up my stang earlier and noticed the revs when up when started up to 2000 and sustained for a few seconds. Left the car and the engine running, when I came back the charging system light was on. I noticed the revs where between 500 and 750. I started to rev up the engine when all of a sudden the charging light goes away, waited again then came back on. I was checking the Haynes Book and I have the impression is either the belt, belt tensioner or the alternator. The belt was replaced when I installed the Paxton. What do you guys think.

TheUNZippee! · November 20th, 2009, 11:39 PM

Check the battery terminal connections for corossion and tightness.

have the alternator and battery load tested.

Another possible culprit is a bad ground somewhere.

brianm · November 21st, 2009, 04:19 AM

I think these cars have a alternator problems if I am not mistaken. But like zip said have the alternator tested would be my first guess.

Mr.Stang08 · November 21st, 2009, 06:51 AM

That's one of the reasons why I was guessing it was the alternator. I know I'm screwed with the warranty because of the Paxton being installed before it expired. But the fact that the light went away when I reved it up made me also think it was the alternator.

brianm · November 21st, 2009, 01:37 PM

pop it off and have it checked

Mr.Stang08 · November 21st, 2009, 11:39 PM

Can they just check it out out of the car? Who does that? Auto Zone? Discount Auto Parts? What do they have some sort of gadget that measures something?

HMUSN · November 21st, 2009, 11:44 PM

hmm.. maybe a stuck diode in the alternator..

What is the stock amperage in an 08???

Mr.Stang08 · November 22nd, 2009, 12:07 AM

I believe it's somewhere around 86 or so.

brianm · November 22nd, 2009, 03:31 AM

Originally Posted by Mr.Stang08

Can they just check it out out of the car? Who does that? Auto Zone? Discount Auto Parts? What do they have some sort of gadget that measures something?

most auto part stores can test them. Yes, you have to take it off and bring it to them.

Mr.Stang08 · November 22nd, 2009, 06:55 AM

I thought I could just take the car and have them check it on the car.

Mr.Stang08 · November 22nd, 2009, 09:58 PM

Does anyone know who can give us discount on alternators? I know American Muscle gives us a 6%. But I live in Central Florida and I can go to Lethal Performance or Brothers Performance. Any clues?

Mr.Stang08 · November 23rd, 2009, 03:09 PM

Oh crap! I went to Auto Zone to check the alternator and it's only sending 11 volts, so it's screwed. There goes mod money to the drain. I guess even taking it to the dealer for warranty would be a waste cause they're gonna pop in the same shity alternator. And to top it off refurbished to later down the road pay for a new one. Might as well change it now. Do you guys know if anyone can hook me up with with a good price?

November 20th, 2009, 11:37 PM	#1
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	Check Charging System Light!! I was warming up my stang earlier and noticed the revs when up when started up to 2000 and sustained for a few seconds. Left the car and the engine running, when I came back the charging system light was on. I noticed the revs where between 500 and 750. I started to rev up the engine when all of a sudden the charging light goes away, waited again then came back on. I was checking the Haynes Book and I have the impression is either the belt, belt tensioner or the alternator. The belt was replaced when I installed the Paxton. What do you guys think. __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 20th, 2009, 11:39 PM	#2
TheUNZippee! Moderator Join Date: Jan 2007 Location: Canada Posts: 61,816 Blog Entries: 1 iTrader: 0 reviews	Check the battery terminal connections for corossion and tightness. have the alternator and battery load tested. Another possible culprit is a bad ground somewhere. __________________

November 21st, 2009, 04:19 AM	#3
brianm Hardcore Enthusiast 2011 ram 1500 hemi Join Date: Sep 2007 Location: sylvan lake, alberta Posts: 1,333 iTrader: 0 reviews	I think these cars have a alternator problems if I am not mistaken. But like zip said have the alternator tested would be my first guess. __________________ vmp500 hp. jba lts. powerhouse d/s Sold Last edited by brianm; November 21st, 2009 at 04:24 AM.

November 21st, 2009, 06:51 AM	#4
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	That's one of the reasons why I was guessing it was the alternator. I know I'm screwed with the warranty because of the Paxton being installed before it expired. But the fact that the light went away when I reved it up made me also think it was the alternator. __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 21st, 2009, 01:37 PM	#5
brianm Hardcore Enthusiast 2011 ram 1500 hemi Join Date: Sep 2007 Location: sylvan lake, alberta Posts: 1,333 iTrader: 0 reviews	pop it off and have it checked __________________ vmp500 hp. jba lts. powerhouse d/s Sold

November 21st, 2009, 11:39 PM	#6
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	Can they just check it out out of the car? Who does that? Auto Zone? Discount Auto Parts? What do they have some sort of gadget that measures something? __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 21st, 2009, 11:44 PM	#7
HMUSN Doc 1986 SVO Join Date: Nov 2006 Posts: 36,836 iTrader: 9 reviews	hmm.. maybe a stuck diode in the alternator.. What is the stock amperage in an 08??? __________________

November 22nd, 2009, 12:07 AM	#8
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	I believe it's somewhere around 86 or so. __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 22nd, 2009, 06:55 AM	#10
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	I thought I could just take the car and have them check it on the car. __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 22nd, 2009, 09:58 PM	#11
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	Does anyone know who can give us discount on alternators? I know American Muscle gives us a 6%. But I live in Central Florida and I can go to Lethal Performance or Brothers Performance. Any clues? __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

November 23rd, 2009, 03:09 PM	#12
Mr.Stang08 Hardcore Enthusiast 2008 Mustang GT Premium 13.30@101.67 Join Date: Oct 2008 Location: Kissimmee, FL Posts: 1,447 iTrader: 0 reviews	Oh crap! I went to Auto Zone to check the alternator and it's only sending 11 volts, so it's screwed. There goes mod money to the drain. I guess even taking it to the dealer for warranty would be a waste cause they're gonna pop in the same shity alternator. And to top it off refurbished to later down the road pay for a new one. Might as well change it now. Do you guys know if anyone can hook me up with with a good price? __________________ Paxton/Vortech Crew Founder #1 Kooks LT's with Catted X-pipe, Roush Stingers, Paxton NOVI 2200 H.O., Hurst STS, BMR Stage I Suspension Kit, FRPP Dampers, Tuned by VMP.

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