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If it's not working I would leave the warm air intake off and block the tin. Leave the vacuum ports disconnected and make sure the carb end is blocked as well. If you can find a way to get the flap sorted then it will probably make a difference for the spring and autumn months Sent from my...

You will probably notice it more in winter I think as it pulls in warm air from the lower tin. I think the filter uiubgor from me had it, no idea if it's swappable or how easy it might be..... Sent from my Pixel 4 using Tapatalk

Yeah they are numbered on the plastic :) Sent from my Pixel 4 using Tapatalk

These arrived this morning so I might get a chance to sort it at the weekend :) Sent from my Pixel 4 using Tapatalk

Yup it is you need this: https://www.buttysbits.com/product/bb-155-westfalia-sliding-door-helper/ Or with the handle: https://www.buttysbits.com/product/bb-169-westfalia-sliding-door-helper-handle/ I've been saying for a few years I need to buy one, you might have given me the nudge I needed...

So with one switch the warning light won't work either with a 2 or 3 pin switch as the warning circuit relies on one switch working to put power to the warning light. The advantage of 2 switches is that of one of them fails the other will still operate the brake lights, with a single switch...

Looking around it looks like the ATE cylinders for the 70 only have one port for the switch. As long as it's working stick with it I guess..just check the lights every so often :) Sent from my Pixel 4 using Tapatalk

Cheap enough to swap for the heritage one with 2 switches then :D Sent from my Pixel 4 using Tapatalk

And the heritage one shows two ports for brake switches https://www.heritagepartscentre.com/uk/211611021T-brake-master-cylinder-left-right-hand-drive-without-servo.html Sent from my Pixel 4 using Tapatalk

This one? https://www.justkampers.com/vw-t2-bay-window-parts/t2-bay-braking-system-parts/brake-master-cylinders-wheel-cylinders/211-611-021-t-brake-master-cylinder-vw-t2-1970-only-non-servo.html The wiring diagrams show 2 switches for a 1970 so not sure why it would only have one Sent from my...

Hey Mike, I assume it's dual circuit? You would normally have one switch for each circuit to give redundancy, have you got a pic of it? I'm wondering if it had a blanking screw in it for the other port. I would say with a 2 prong switch your warning light definitely wont work aside from...

If you do go that route I read some bad things about the cheap 3 pin switches that most places sell. I managed to get 2 Febi ones (part 46024) from opieoils but they are out of stock now. Worked out about £12 each. You can get some ATE/FTE ones but they are silly money

I hadn't come across that yet :) nice find. I also found this that offers a bit more explanation: https://www.thesamba.com/vw/forum/viewtopic.php?t=587777&view=next So I think as I don't have the plunger switch or appropriate master cylinder the 3 prong switch is the way to go. Will have a try...

I think that's how mine was wired and I don't think it would ever work :) no idea why it occasionally flashes now, probably a bad connection. The 3 pin switch takes on the role of the 3rd switch in the early setups Sent from my Pixel 4 using Tapatalk

Nope that's K9 on the cluster Sent from my Pixel 4 using Tapatalk

Also found this diagram but not sure where the switch is meant to be Sent from my Pixel 4 using Tapatalk

Hey that's the diagram I was looking at but I don't seem to have J4, I assumed that was also on the master cylinder but maybe I was wrong? Do you have that anywhere? I think mine goes directly to the brake warning light but i might need to check again ... Sent from my Pixel 4 using Tapatalk

I think it depended on where it was being shipped to, more of a US thing? I've ordered some 3 pin switches now, managed to find some febi.ones rather than the unbranded versions from the normal suppliers Sent from my Pixel 4 using Tapatalk

My brake warning light has had a habit of randomly flickering on over the past few years so I decided to have a quick look this weekend, safety first and all that. It looks at some point the master cylinder has been changed to one that takes 2 switches although the switches themselves are the 2...

This might help, from the hs2000 installation instructions: Note: The combustion air pipe can be terminated underneath the vehicle making sure the end of it is at least 0.5 metres away from the end of the exhaust and that they are not pointing directly at each other. Take care to ensure that...