battery light

[shonutt]

i looked down today while driving threw town at a stoplight the battery light was on ?? i accelerated the light went away ...i stop back on again wtf ?.. i have a new battery all connections are good what could cause this is it new alternator time!! or what please help

 

[F-22 Raptor SHO]

There is a cable that runs to the alternator on the right (drivers side). It has an eyelet connector. Check the connector, most likely it is broken and during acceleration, when the motor moves so does this cable away from the alternator, thus giving you the light. I've had to replace mine twice in 9 years.

 

[djsSHO]

I would say that yes if the above post doesn't work the fact that the light comes on at a stop either means your idle rpms are too low, or your alternator is no longer kicking out the juice it should be at idle. It should be replaced or at least tested for proper output. Best of luck to ya!

 

[shonutt]

There is a cable that runs to the alternator on the right (drivers side). It has an eyelet connector. Check the connector, most likely it is broken and during acceleration, when the motor moves so does this cable away from the alternator, thus giving you the light. I've had to replace mine twice in 9 years.

where is this cable connected to on the alternator ?

 

[shonutt]

OK HERES THE SCOOP, my voltage dropps down to 11.4 and jumps to 12.1 ... my light seem so dimm .. then out of know where the volts jump to 13.4 .. then drop to 12.7 and fluctuates .. im going to get the alternator test done after work tonight will post back results soon ..

 

[SHO SPD]

New alternator. It should be putting out above 13v at all times. usually around 14 v.

 

[97SHOgt]

Definitely alternator. I had a problem with the battery light coming on when I hit high RPM's, then one day it puked on me and left me sitting along the road. Alternator would be my guess as well.

 

[shonutt]

yep my alt... is TOAST well almost it failed the diode test it was pushing out the 13 volt peak but .. it could not maintain them or i should say it wasnt keeping a constant voltage shhhiiiiiiiii...... oh well got an oppointment tomarrow morning at ford $340 ..

 

[SHOtime2511]

do you have a A/C delco alt???

 

[djsSHO]

Dealer!!??

Unless you don't have the tools to do it this is a pretty simple DIY project, but I don't know your current situation. At least you know exactly what the problem is now.

 

[shonutt]

well ford craped on me they the alt they had was for a differant caR in the wrong box .. my current alt i have on that is bad is a stock motorcraft .. i geuss i will be getting a car quest alt now .. not sure the brand but i need that baby asap so i will have to settle with it .. its my daily driver and i cant go without the car sooo im screwed ... i would do it myself but i don't have many tools and between working and my free time i realy don't have time to take on that type of project :shakehead

 

[masho95]

i don't have many tools and between working and my free time i realy don't have time to take on that type of project :shakehead

Don't take this the wrong way, but... how do you own a SHO and not do any of your own work? I mean changing an alternator is right up there with changing a tire. Cancel some of that free time, go buy a cheap set of tools, and change the alternator. There's nothing like bonding time with the SHO.

 

[shonutt]

WELL GOT THE NEW ALT STILL HAVE THE SAME PROB EXCEPT MY RPmS IDLE AT 1000 -1200.. and no battery light ...COULD mY BELT BE CAUSING THIS!! i mean IT LOOKS A CRACKED ON THE GROOVED SIDE .. instead of having the smooth straite lines the lines have cracks in them .. i put belt dressing on it but no help ..i am so frustrated after i got the alt on it was putting out 13.8 then after a wile later like always the volts jumped down to 12.3 then 11.4 ... somtimes hitting 10 ...all my battery cables ar nice and tight and my battery is new alt is now knew ... i just never replaced the belt any ideas on what it could be ???? :shakehead :cry: :cry:

 

[F-22 Raptor SHO]

Your idle is messed up because you disconnected the battery and didnt reset the idle per procedure. Search term "idle reset"

the alternator may have been junk, but I'm for the simple things first and would look at the eyelet connector on the right side of the alternator to make sure its clean, tight, and unbroken. I would also look at the condition of the cables going to the alt. Make sure they arent corroded inside.

 

[SHO#7]

I second that the idle is crazy because of the shops lack knowledge. You just need to do an idle relearn. Search on it, there are tons of threads.

I also second learing some about the car. Buy a manual on the car. Read through it. You will lose some of the anxioty ( sp? ) that you have. The car has a big scary intake, but after that. It is just a 3.0 Not bad to work on at all.

Mike

 

[shonutt]

the connecter is good on the side of the alt i put a voltmeter on it while it was running i got 11.9.. the same as the battery with the car off... hmmm i dont think its charging mt batt now either .. got another alt comming but i hope it gets here before my car dies .... put it on the test thing at advanced auto .. my volts read 11.88 and mmy peak was 2.0

 

[ycode90]

Did yopu fully charge the batt. before hooking up the new alt. The alt. senses how much output to make from the batt. It is possible to ruin a new alt. by not supplying proper volts.

 

[shonutt]

ok i am ****** off bad ... the car died on me last night ... do to lack of alt power it was just running off of my battery ...so i had my car towed to the shop ...the shop calls me up this morning and tells me my alt and has been tested and is fully functioning is and the batt was fully charged.... they said it fired rite up and is pushing out the full volts .. how can this be !!!!!.. it was dead and my volts stedily declined befor my eyes ...all the connections ar good ...i am ****** ..any ideas what the h e double hockey sticks is going on ?? cause i could use all the help i can get

 

[shonutt]

OK I THINK ITS UNDER CONTROL NOW 4 ALTERNATORS LATER AND A 12 PACK WITH A FEW SHOTS TO CALM MY NERVES THE I AM FINALLY MANTAINING VOLT BUT ITS ONLY BEEN 24 HOURS .. REFERBISHED ALTERNATORS SUCK !! BUT WHAT CAN YA DO

 

[djsSHO]

Oh what fun a SHO is

Hope it's worked out for ya