1999 Ford Mustang battery runs dead when sitting

Tiny
RYDNKITTY
  • MEMBER
  • 1999 FORD MUSTANG
  • V8
  • 2WD
  • MANUAL
  • 34,500 MILES
My mustang has less than 35000 miles. When I do not drive it the battery runs dead. Usually it will only sit for a week or two when this happens. I bought it a year ago and it only had 4000 miles in it, it sat in a garage in Hawaii for 8 years. My experience with this issue is that it is usually the voltage regulator that causes this.I have owned a few older Mustangs but I am unfamiliar with this year, where do I find the voltage regulator on this model?
Monday, July 19th, 2010 AT 10:07 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lets do this put a test lite between the negative cable and the negative battery post if the test lite lits you have a short circuit in the electrical system now disconnect the alternator if the test lite remains lit, its not coming from the alternator.

Do below battery drain test


https://www.2carpros.com/forum/automotive_pictures/12900_parastic_draw_1_231.jpg

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Tuesday, July 20th, 2010 AT 5:02 AM

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