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1998 Ford Mustang slow battery drain

Tiny
DAVIDSAUN
  • MEMBER
  • 1998 FORD MUSTANG
  • 6 CYL
  • 2WD
  • MANUAL
  • 89,000 MILES
Hi, and thanks in advance for any help!

normaly if left overnight its fine, but if left for 2 days without being started the battery is drained.

everything seems to work and I don't have fuse issues, I was thinking voltage regulator, but unsure of how to test, besdies just replacing it.

any other ideas?
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Monday, June 21st, 2010 AT 2:53 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

You will have to do a currant drain test on the electrical system, this is where you place an Amp meter between Bat Pos (+) and the cable, with key out and doors closed check current draw, you should only have about.1 -.2 Amp draw down, any more and start pulling fuses and fuse links one at a time to isolate the faulty circuit, also disconnect the alt as a teas as a faulty diode in the rectifier can cause this as well.

Mark (mhpautos)
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Monday, June 21st, 2010 AT 5:38 PM

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