[98mustangfla]

Notice today the gauge on amp output was on "O".I turn the a/c and Radio off and it goes p to "R"??

Any ideas??

The battery is 3 years old.

Thanks.

98Mustangfla

[Breakout]

Sounds maybe like an alternator problem. Your car starts okay despite these problems? Try being more specific

[98mustangfla]

Had all the brakes repalced and one rotor. Possibility this would trigger the check engine light?? I checked all fluids..OK
Temp gauge and oil pressure gauge fine.

Any ideas?/

I did notice the battery is jumping from "R" to "O". It is 3 years old. Would the light come on for low battery??

Thanks.
98mustangfla

[Breakout]

Take it to advance auto and they can do a battery or alternator check

[Breakout]

Originally Posted by 98mustangfla Had all the brakes repalced and one rotor. Possibility this would trigger the check engine light?? I checked all fluids..OK Temp gauge and oil pressure gauge fine. Any ideas?/ I did notice the battery is jumping from "R" to "O". It is 3 years old. Would the light come on for low battery?? Thanks. 98mustangfla

you went from amp guage to check engine light...are you having more then one problem?

and no brake maintenance has nothing 2 do with check engine light

[Cricket]

sounds like your car is undercharging. Go with what breakout said. Have them check your alternator, and the cables, if those check out alright have them do a test on your battery.

[98mustangfla]

I screwed with the reply.


Yes, it starts up no probelm.
Would the check engine light come on for that??

Any ideas on cost to take care??
Thanks man.

[El_Cangri]

u can check the alternator your self by starting the car and then disconecting the negative battery cable the car is supposed to not turn off... if nothing happened go to a shop and get your alternator check and every other electric things like cables and all(it can be somethng loose)

[Breakout]

probably not

[Cricket]

the cel usually won't come on for undercharging. The cel could be for a number of things. Best bet bring it to a place like advanced auto parts that does free obd II readings.

[Breakout]

Originally Posted by El_Cangri u can check the alternator your self by starting the car and then disconecting the negative battery cable the car is supposed to not turn off... if nothing happened go to a shop and get your alternator check and every other electric things like cables and all(it can be somethng loose)

this puts a high load on the alternator. if there is a problem with the alternator, this will probably do it in and youll have to get a tow. Just have advance auto check it in the morning

[El_Cangri]

I've always did that and never had a problem but just in case I will never do it then cause Idk it would do mayor damage....

[Breakout]

no major damage. I was told to do it by a friend of a friend in high school on my old car, and what juice was left in the alternator fried and i couldnt make it to advance auto and had to pay 4 a tow

[El_Cangri]

ohh that could be bad luck caue never happened to me :p and I have done it on my stang a 240sx an old accord.... i think it may depend on the alternator problem( I mean what part of the altrnator is fucked)

[ESG-642T]

Originally Posted by El_Cangri u can check the alternator your self by starting the car and then disconecting the negative battery cable the car is supposed to not turn off... if nothing happened go to a shop and get your alternator check and every other electric things like cables and all(it can be somethng loose)

HORRIBLE ADVICE


- anyway in all my infinite wisdom I'm gonna say your alt is going bye bye

[Juggalo_X]

Your alternator will not throw a light until the amperage output drops below 3.5amps thats the bare minimum to keep the car running and keep your battery from going flat. i know this because i just did my alternator this morning it was putting out a measly .5 amps at 2k rpm so it was fucked. you can test the alternator your self and all the corresponding circuits very easily in under 15 min with a volt meter. and of course the directions for the pinpoint test. i used the ford TSB and service manual cd i downloaded i tell yah the thing is as good as gold and 10x better then a Haynes manual. on a positive note my head lights dont dime when my stereo and blower motor are both on any more and a new heavy duty alternator set me back 280 bux with a 2 year warranty. watch out for the top mounting both tho mine was stuck and i snapped the bitch off luckily it was easily removed with my figures after i got the alternator off.

[Juggalo_X]

Originally Posted by SSStang Originally Posted by El_Cangri u can check the alternator your self by starting the car and then disconecting the negative battery cable the car is supposed to not turn off... if nothing happened go to a shop and get your alternator check and every other electric things like cables and all(it can be somethng loose) HORRIBLE ADVICE - anyway in all my infinite wisdom I'm gonna say your alt is going bye bye

+1 its a real bad idea cuz the pcm will freek out if you do that because it uses the battery to take the reading and thus regulates the voltage accordingly. the voltage regulation is done in the pcm with the 99+ i asked my mechanic yesterday when i went for a second opinion on my alternator.