Brake booster vacuum pump?

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.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 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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Brake booster vacuum pump?

1 Reply

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