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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Is this an alternator problem?

  • Thread starter Thread starter KB5.0GT
  • Start date Start date Jul 23, 2006

KB5.0GT

New Member
Aug 31, 2004
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0
Danville, CA
Jul 23, 2006
#1
  • Jul 23, 2006
  • #1
Hi there, I have a drained battery problem on my 1995 GT and I was hoping you guys could point me in the right direction. Two days ago I took my car out and I noticed that my volts were rising as my rev's were. For example over 3,000 rpm my voltage would raise to about 16v to about 17 at 4,500ish. When my volts would spike my battery light would come on.

So the next day my car ran fine, solid voltage all day.

Then this morning my battery was completely drained. After jumping it the same voltage spike was happening and the battery will not stay charged. I think my alternator is done for.

What do you guys think the problem is, and how should I fix it? Thanks for your help.
 

mo_dingo

20+ Year Stangneter
Aug 26, 2003
3,031
2
58
Tucson, AZ
Jul 23, 2006
#2
  • Jul 23, 2006
  • #2
KB5.0GT said:
Hi there, I have a drained battery problem on my 1995 GT and I was hoping you guys could point me in the right direction. Two days ago I took my car out and I noticed that my volts were rising as my rev's were. For example over 3,000 rpm my voltage would raise to about 16v to about 17 at 4,500ish. When my volts would spike my battery light would come on.

So the next day my car ran fine, solid voltage all day.

Then this morning my battery was completely drained. After jumping it the same voltage spike was happening and the battery will not stay charged. I think my alternator is done for.

What do you guys think the problem is, and how should I fix it? Thanks for your help.
Click to expand...

Sounds like the voltage regulator in the alternator is shot. When the voltge spikes, check the voltage at the main lug on the back of the alternator. If it's higher than 14.4V your regulator is shot. Part no. FF169D from checker and it looks like they stock it.
Scott
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jul 23, 2006
#3
  • Jul 23, 2006
  • #3
I agree with Scott. I'd add one more thing to check - the sense wire. Because the issue comes and goes, a bad connection with this wire can cause the alternator to freak out.
 

KB5.0GT

New Member
Aug 31, 2004
14
0
0
Danville, CA
Jul 23, 2006
#4
  • Jul 23, 2006
  • #4
Thanks alot for your help. I'll work on fixing it tommarrow.
 

94-302-vert

Active Member
Aug 16, 2004
1,947
2
36
NE CT
Jul 24, 2006
#5
  • Jul 24, 2006
  • #5
If the batttery is not holdign the charge, battery....

If the battery is bad enough the alternator will try to overvoltage to charge it...

I vote battery...
 
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