Hand pull park brake wire?

Tiny
TERRY WILLIAMS4
  • MEMBER
  • 2010 MAZDA 3
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 383,440 MILES
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.
Friday, October 10th, 2025 AT 6:35 PM

4 Replies

Tiny
STEVE W.
  • MECHANIC
  • 15,231 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.
Was this
answer
helpful?
Yes
No
+1
Friday, October 10th, 2025 AT 8:00 PM
Tiny
TERRY WILLIAMS4
  • MEMBER
  • 2 POSTS
Thanks Steve. Very helpful. Cheers.
Was this
answer
helpful?
Yes
No
Friday, October 10th, 2025 AT 10:16 PM
Tiny
STEVE W.
  • MECHANIC
  • 15,231 POSTS
You are welcome.
Was this
answer
helpful?
Yes
No
Sunday, October 12th, 2025 AT 12:53 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
STEVE W. Is one of our best! Use 2CarPros anytime we are here to help.
Was this
answer
helpful?
Yes
No
Tuesday, October 14th, 2025 AT 12:47 PM

Please login or register to post a reply.