Brake booster vacuum pump?

Tiny
JUSTFISH65
  • MEMBER
  • 2004 VOLKSWAGEN TOUAREG
  • V8
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
I have a hard brake pedal, and I’m not getting any power to the plug that connects to the vacuum pump! I’ve tested the pump, and it works, also fuses and relays! The only thing I think could be the problem is the brake switch! Just not sure if the switch goes to the pump.
Saturday, April 13th, 2024 AT 8:44 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,458 POSTS
I would check the ground #G614, here is the wiring diagrams for the brake booster vacuum pump and how to change it out which shows how the vacuum lines go.

This guide can help you check for power and ground, also check for power at fuse #16:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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Saturday, April 13th, 2024 AT 12:08 PM

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