95gt alternator problem

[CC'S95GT]

with the engine running the alt. should only be putting out 14.5vdc not 18v. Sounds like the voltage regulator inside the alt.has taken a crap.

 

[acomaelkhunter]

dayam i had it checked at o'rielly's thursday

 

[acomaelkhunter]

today the alternator briefly ran normal. 14.5 volts at alt and positive battery post. 6v at the stator, then is stopped working. .6 volts at stator and 12v at alt and pos battery post till the battery died

 

[ttocs]

sounds like the alt but its hard to tell online. have a different shop/store check it 2nd opinion never hurts.

 

[acomaelkhunter]

it looks like a simple wiring diagram. btw put my stock pullies back on

 

[Twista]

Take that ALT back and get another one. Tell them this one is not working correctly even though its passing.

If it still fails with the new ALT then you know you have another problem.

 

[acomaelkhunter]

taking it back today and having the battery tested again

 

[ttocs]

you battery might drag the voltage down on the alt but it still doesn't explain the 18v reading earlier assuming you had the meter on right.

 

[acomaelkhunter]

new alternator, same problem.

 

[ttocs]

[/IMG]

looking back through I saw this pic. What is the blue-lookin piece that looks to be on the yellow wire here?

 

[acomaelkhunter]

that was electrical tape. i have since, soldered all new plugs (3 pin and stator). i am getting a weak .2v signal at the stator wire. when its working its 6v.

 

[KidK9]

When did you put the pulleys on?

 

[acomaelkhunter]

i put the UDP on 2 months ago. back to stockers. engine runs cooler.

 

[KidK9]

I know this sounds silly, but is your belt the correct size?

 

[acomaelkhunter]

yes. i was actually thinking of trying a smaller belt and bypassing the AC and smog pump delete pullies

 

[KidK9]

I had the problem where pulleys were installed at the shop and they forgot to switch the belt. Everyone was blaming the electrical stuff. Switch the belt.

 

[acomaelkhunter]

im back to stock pullies and belt...same problem

 

[ttocs]

do you have a link to the alt's schematic? Its obviously something in what is telling the alt to charge or not. I have never looked into the schematic of how it works but I have a degree in electronics and can figure it out if you can show me where it is.

Also try stress-testing the smaller wires on top. Grab them while its running an pull/tug/twist them a little and see what happens.

 

[acomaelkhunter]

this thing is driving me nuts....its running normal now....like fricking super nice!!! let me find the schematic....its pretty straight forward....im hoping its not the computer..

 

[acomaelkhunter]

http://www.veryuseful.com/mustang/tech/engine/images/Mustang-94-95-Alt.gif