1998 Ford Mustang Electrical

Tiny
ICEBEAR1966
  • MEMBER
  • 1998 FORD MUSTANG
  • 3.8L
  • 6 CYL
  • 2WD
  • MANUAL
  • 12,000 MILES
My 98 mustang lost all power and stalled on the freeway. I pulled over to the shoulder and tried to start it but it wouldn't start, it had no power anywhere the power locks were out all power was out. It was totally dead. The battery was dead so I put in a brand new one, the fuses were good and the ignition switch was good a mechanic checked it but it is still dead and won't start. Can't run a diagnostic because it has no power. Can you help?
Monday, September 28th, 2015 AT 5:44 PM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
What did the mechanic say or find?

Follow the smaller positive battery wire to the under-hood fuse box and be sure that connection is clean and tight.
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Monday, September 28th, 2015 AT 6:18 PM
Tiny
ICEBEAR1966
  • MEMBER
  • 2 POSTS
There is power coming from the fuse box to the ignition switch.
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Monday, September 28th, 2015 AT 6:36 PM
Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
The ignition switch has multiple sections that each feed multiple circuits, so something should be working.

Turn the head light switch on, then measure the voltage across the battery posts, then measure the voltage on the large output terminal on the generator.
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Monday, September 28th, 2015 AT 6:49 PM

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