Brake pressure switch sticking on

evopinz · Post by **evopinz** » Tue Mar 09, 2010 10:04 pm

My brake lights sometimes stay on when the brake pedal is released. Is there an after market switch that would do the job or does it have to be a genuine part? Would it be possible to fit without the need to bleed the brakes?
Cheers
Peter

Jim LaGuardia · Post by **Jim LaGuardia** » Wed Mar 10, 2010 1:53 am

It is a Mercedes part and VW part. You must use the short un-tapered thread version with copper sealing washer.
Using the tapered thread type will damage master cylinder and leak

Switch can be installed without bleeding if done quickly. After installing new switch, pump brake pedal 30 times to expell any air from master back to reservior and check for leaks.

evopinz · Post by **evopinz** » Wed Mar 10, 2010 5:05 am

Thanks Jim,
I will look for the switch via Mercedes/VW and thanks for the tips.
Peter

Fleg · Post by **Fleg** » Tue Jun 29, 2010 8:49 am

Sorry to bring up a older topic but does anyone have the part number or a vehicle that this switch came off of?

The only thing I could find was this;

http://cgi.ebay.com/ebaymotors/Beck-Arn ... 35a9e7a885

pcolette · Post by **pcolette** » Tue Jun 29, 2010 10:24 am

The switch is available from SAV: http://www.pinzgauer.com/showdetails.ph ... 101366062/

Maybe someone else on the forum has the VW part number.

Paul

Thomas-E · Post by **Thomas-E** » Tue Jun 29, 2010 1:18 pm

I haven't replaced one yet but I found this info in the Pinzgauer Alternative Parts List.

"Brake Light Switch Volkswagen or NAPA 1981 Rabbit

(CAUTION! THERE ARE 2 TYPES, ONLY ONE FITS!!)":shock:

NAPA sells a large assortment of copper seal washers also.

TIP: If you want to re-use the old washer you should
anneal it first, so that it will make a good fit.

The eBay link above lists what looks to be the same part.

Read what Jim Laguardia says about the threads!

Edit; July 5, 2010, PDT

Fleg · Post by **Fleg** » Wed Jun 30, 2010 4:35 pm

I ended up going to a local Volkswagen Garage and bought a brake switch.

Manufacture, AUMA
Part # 113 945 515 H
Stop Switch

Works great.

Scooter · Post by **Scooter** » Mon Jul 05, 2010 12:49 pm

I tried the VW switch way with the local VW shop. Found out it was the wrong thread type after I bought it and tried to install it. What a mess. You are better of getting the SAV part from the start and saving a lot of head aches.

Scooter

Fleg · Post by **Fleg** » Tue Jul 06, 2010 3:26 pm

Scooter wrote:I tried the VW switch way with the local VW shop. Found out it was the wrong thread type after I bought it and tried to install it. What a mess. You are better of getting the SAV part from the start and saving a lot of head aches.

Scooter

Did you get the switch from a 1981 VW Rabbit? There is no way the threads could be different.

Scooter · Post by **Scooter** » Tue Jul 06, 2010 7:38 pm

They looked up the part number and said there was 2 part numbers. they only had one in stock, of course it was the wrong one. I did not take out the old one until I had the new one, so there was no way to konw. I showed them the picture, but it was hard to tell if the treads were tappered or not.

Scooter