• Mustang Forums
  • 1974 - 1978 Mustang II Talk & Tech

1975 Mustang ll Wiring Help Needed

  • Thread starter Thread starter Hawkk72
  • Start date Start date Nov 27, 2007
H

Hawkk72

New Member
Dec 13, 2006
47
0
0
Nov 27, 2007
#1
  • Nov 27, 2007
  • #1
I replaced my alternator, hooked up the negative battery cable and the fusible link going to the positive side of the starter solenoid immediately fried. Could something be wrong internally in the new alternator to cause this? Where does that fusible link wiring connect to besides the soleniod? Is a replacement available?
 
S

suki243

Member
Dec 19, 2006
662
0
19
Southern California
Nov 27, 2007
#2
  • Nov 27, 2007
  • #2
so you didn't turn the key or anything, just as soon as you connected the negative battery cable, the fuse blew?

I'm not 100% sure but check to see if a wire from the positive terminal is touching the body somewhere.
I'm from the classic section and i recently replaced my alternator so this thread caught my attention, So i'm not sure how the 75 looks/ works or how its wired. but normally shorts are caused by that. and i believe replacements are readily available at the local pepboys or autozone or something... between my new 110 amp alternator and battery i have a 175 amp fuse...
 
C

COBRAIIW

New Member
Apr 26, 2003
562
1
0
CT
Nov 27, 2007
#3
  • Nov 27, 2007
  • #3
Does the large cable on the alternator come in contact with any part of the alternator casing?
Could have happened inadvertantly.
 

Wart

I'm Mad as HELL and I'M not Gonna Take it ANYMORE!
Founding Member
Sep 1, 1998
408
3
58
NE Ohio
Nov 27, 2007
#4
  • Nov 27, 2007
  • #4
Would this be the fusible link powering the car or would this be the fusible link going to the alternator?

If the link going to the alternator then something in the alternator is bad.

If it's the car power link ... OOOooo, that sucks nuts. I hope it shorted out before it got too deep into the loom.
 

Wart

I'm Mad as HELL and I'M not Gonna Take it ANYMORE!
Founding Member
Sep 1, 1998
408
3
58
NE Ohio
Nov 27, 2007
#5
  • Nov 27, 2007
  • #5
COBRAIIW said:
Does the large cable on the alternator come in contact with any part of the alternator casing?
Click to expand...

Yep, the main lead could have rubbed through, or the insulation could have gotten brittle and exposed a patch of wire. Or, Or, ... stud on the alt could be grounding, or ...
 
C

COBRAIIW

New Member
Apr 26, 2003
562
1
0
CT
Nov 28, 2007
#6
  • Nov 28, 2007
  • #6
Any luck yet?
 
You must log in or register to reply here.

Similar threads

M
85 mustang 5.0 cranking in run position
  • Mamaclean
  • May 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
129
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 1, 2026
General karthief
S
Resolved Yellow Wire from Start Solenoid
  • Smoky5oh
  • Mar 14, 2025
  • Fox 5.0 Mustang Tech
Replies
5
Views
556
Fox 5.0 Mustang Tech Mar 30, 2025
Smoky5oh
S
J
Power Wire Upgrade Question
  • jhaling
  • Dec 21, 2025
  • SN95 4.6L Mustang Tech
Replies
2
Views
248
SN95 4.6L Mustang Tech Mar 23, 2026
Noobz347
C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
221
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
F
Electrical From scratch: alternator wiring
  • fox racer v2
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
0
Views
568
Fox 5.0 Mustang Tech Jun 23, 2025
fox racer v2
F
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1974 - 1978 Mustang II Talk & 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?