Brake booster vacuum pump?

2004 VOLKSWAGEN TOUAREG

190,000 MILES • V8 • 2WD • AUTOMATIC

JUSTFISH65

MEMBER
1 POST
FOLLOW

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.

Apr 13, 2024 at 8:44 AM

STRAILER

CERTIFIED EXPERT
53,854 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

Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.

Images (Click to enlarge)

Apr 13, 2024 at 12:08 PM