• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Amp meter not working

  • Thread starter Thread starter 86bluecobra
  • Start date Start date May 18, 2007
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 18, 2007
#1
  • May 18, 2007
  • #1
Ok so my battery charges but my amp meter show a negitive current. My car has a 1 wire power master alt upgrade but I would like to get my amp meter in my dash to work correctly. How do I do this. My car is a 86 i believe that is the last year of a amp meter before they switched to volt meter. Any help would be appreciated. thx in advance.
 

Aryan15

Member
Sep 22, 2003
236
0
17
CA
May 18, 2007
#2
  • May 18, 2007
  • #2
Does it fluctuate with rpm changes? If so, then its because you wired with one wire and its reading discharge.
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 18, 2007
#3
  • May 18, 2007
  • #3
it doesn't seem to fluctuate with rpm. it just reads in the negitive when the engine is running.
 

stang&2Birds

Founding Member
May 4, 2000
2,091
5
58
New England. :-) CT/MA
May 18, 2007
#4
  • May 18, 2007
  • #4
Your ammeter works just as well now as when it was new. So, what's the big deal?

"One of these days", I'm going to replace the non working ammeter with a voltmeter. That POS ammeter caused me to get stranded when my alternator died and I didn't have any indication.
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
May 19, 2007
#5
  • May 19, 2007
  • #5
I just want it to work was wondering if anyone had a diagram of how the thing is wired or if there is some test I can perform to see if the gauge is even still working.
 
You must log in or register to reply here.

Similar threads

Engine Contour fan CFM
  • Mustang5L5
  • Apr 6, 2026
  • Fox 5.0 Mustang Tech
Replies
13
Views
355
Fox 5.0 Mustang Tech May 22, 2026
qikgts
Radio, Speaker Upgrades
  • TripleYellow
  • Apr 24, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
0
Views
101
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 24, 2026
TripleYellow
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
241
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
S
Resolved Yellow Wire from Start Solenoid
  • Smoky5oh
  • Mar 14, 2025
  • Fox 5.0 Mustang Tech
Replies
5
Views
529
Fox 5.0 Mustang Tech Mar 30, 2025
Smoky5oh
S
D
89 foxbody fuel pump not priming
  • Dubsantana
  • Jul 6, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
455
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 12, 2025
AeroCoupe
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?