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Electrical Parasitic draw help

  • Thread starter Thread starter SFIFITY
  • Start date Start date Jul 4, 2019
S

SFIFITY

New Member
Jul 4, 2019
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Jul 4, 2019
#1
  • Jul 4, 2019
  • #1
Got a 1993 mustang had it for about 6months and about two weeks ago I went to start my car and the battery was completely dead.i then jumped the car and it started right up.i drove it for about 45min and shut it off. The next day I went out to start it and it was completely dead again. So I took the battery to autozone had it charged and tested and it and it failed the test after it was charged so I purchased a new battery and installed it in the car. The following day I went out to start it after the new battery was put in it was completely dead again. So last night I threw it on the charger I have here at home and this morning I took my volt meter to it and was reading 12.6v,so I decided to to a parasitic draw. Ran my meter on the 10a scale and was reading .432(432miliamps) witch is way to high of a draw so I started pulling fuses and got to fuse 17 and pulled it and it dropped down to .014 witch is Way below the 50Miliamp limit. So I looked behind the fuse block to only find a yellow wire and a white/purple wire run long to fuse location My question is fuse 17 is labeled as a spare so I need to figure out we’re else these wires go to.any help is appreciated

Car is completely stock with a 1 wire alternator. No Interior Lights on, no alarm,
 

fredfifty

5 Year Member
Nov 23, 2011
318
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Jul 5, 2019
#2
  • Jul 5, 2019
  • #2
did you test your alternator?
 
S

SFIFITY

New Member
Jul 4, 2019
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#3
  • Jul 5, 2019
  • #3
Yes. It’s charging fine 14.4-14.6v
 

Blown88GT

Founding Member
Nov 13, 1999
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Palm Beach Gardens, FL
Jul 5, 2019
#4
  • Jul 5, 2019
  • #4
Leave fuse 17 out. Problem solved.
 
S

SFIFITY

New Member
Jul 4, 2019
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1
San Francisco
Jul 5, 2019
#5
  • Jul 5, 2019
  • #5
Blown88GT said:
Leave fuse 17 out. Problem solved.
Click to expand...
I want too fix the problem.not just leave the fuse out
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Jul 5, 2019
#6
  • Jul 5, 2019
  • #6
Put fuse #17 back in and pull the wire off the alternator, check if it still draws too much power.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,248
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Massachusetts
Jul 6, 2019
#7
  • Jul 6, 2019
  • #7
I have fuse 17 as "premium sound amplifier" in a 1993
 
S

SFIFITY

New Member
Jul 4, 2019
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Jul 7, 2019
#8
  • Jul 7, 2019
  • #8
Mustang5L5 said:
I have fuse 17 as "premium sound amplifier" in a 1993
Click to expand...
Every diagram I found only list it as a spare.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,248
17,929
224
Massachusetts
Jul 7, 2019
#9
  • Jul 7, 2019
  • #9
SFIFITY said:
Every diagram I found only list it as a spare.
Click to expand...

On 87-92 it is a spare.

In 1993 it's the amp



Unplug the amp under the seat and see if the draw goes away
 
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