Hand pull park brake wire?

2010 MAZDA 3
383,440 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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TERRY WILLIAMS4
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  • 2 POSTS
Should the single wire (purple) to the park brake switch have battery voltage when key is in acc or on position or is it actually a ground wire? My vehicle has 12v from the park brake wire.
Oct 10, 2025 at 11:35 AM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,387 POSTS
It should have voltage on it. Then when you pull it to apply the brake it connects to ground and turns on the brake indicator. It works just like the low brake fluid lamp.
Oct 10, 2025 at 1:00 PM
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TERRY WILLIAMS4
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  • 2 POSTS
Thanks Steve.Very helpful.Cheers.
Oct 10, 2025 at 3:16 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,387 POSTS
You are welcome.
Oct 12, 2025 at 5:53 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,616 POSTS
STEVE W. is one of our best! Use 2CarPros anytime we are here to help.
Oct 14, 2025 at 5:47 AM
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