PCM wiring diagrams?

2003 FORD TAURUS
90,000 MILES • 3.6L • AUTOMATIC
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SPACEXCUB
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  • 1 POST
My car won’t start. When you turn the key, it instantly blows the pcm fuse. Must be a short in the wiring? I need the wiring diagram.
Jun 20, 2026 at 10:42 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,616 POSTS
I have seen a shorted ignition coil/fuel injector do this as well FYI. Here is a guide to help you figure out what is going on with the PCM wiring below.

https://www.2carpros.com/articles/how-to-check-wiring/

Let me know how it goes.
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Jun 20, 2026 at 12:03 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,616 POSTS
Try unplugging the ignition coils and replace the fuse and turn the key on to see what happens.
Jun 20, 2026 at 12:10 PM
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