Rostra universal cruise brake switch help

[jocoman]

Hi folks.
I'm taking a stab at installing the universal cruise control system.
I am fabbing a switch holder for a brake switch and a switch holder for the clutch switch.
Rostra want to see a ground on the violet lead when the cruise is engaged.
I picked up a universal normally closed stop light switch.
It is normally closed however when installed and riding the brake lever it is open.
I can't see how I can supply a ground when the brake is not used.
I think I need a normally open stop light switch that is closed when installed on the brake pedal to make this thing work.

Is there such a thing?
Txs
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"

[MarkWard]

Yes, the clutch pedal switch should open when the pedal is depressed. The brake switch if you need to provide a continuous ground for the cruise, it should work like the clutch pedal switch.

It's opposite of how a mechanical brake light switch works. It completes the circuit when the bayonet comes out. So, you'd be looking for clutch pedal switches not brake pedal switches if I understand your question.
_________________
☮️

[jocoman]

Yes, exactly!
I can't easily find one on-line in Canada yet.
Txs
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"

[MarkWard]

Bayonet switch “normally closed”
_________________
☮️

[jocoman]

Can you look up an appropritae switch for me on Digikey?
I was overwhelmed with so much choice when i looked.
Amazon up here had nothing quick.
txs
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"

[jlrftype7]

not sure if this one is of use for you, but it's available off amazon seller. Looks Generic enough for 2 flat pins with your wiring, and easy enough to cobble a mounting brake for the stem mounting section.

https://www.z1motorsports.com/switches/nissan/oem-...10345.html
_________________
'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto

[jimf909]

Rostra sells a clutch disengagement switch kit 250-4206 and it's available at many online sellers...
https://www.google.com/search?q=rostra+cruise+cont...p;ie=UTF-8

Here's a pic of it installed on my van...

For the brake switch, connect the Rostra purple to the Red/Black on the brake switch at the master cylinder. Given the VW brake switch is a pressure switch and it doesn't illuminate the brake lights until some pressure is applied I use the clutch to disengage the cruise 95% of the time.

I have my dash apart, here's the purple connected to the red/black...

Here are the install instructions with wiring suggestions...
http://rostra.com/manuals/250-4206_Form2391A.pdf
_________________
- Jim

[jocoman]

Thank you very helpful.
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"

[jimf909]

jocoman, I realize you pm'd me with questions so I'll answer them in your thread for visibility...

[jocoman]

Oh thank you.
I am using the Rostra VSS with 2 magnets.
I have the vss mounted on the passenger side and the control unit mounted like you.
I would love to get the settings. Rostra tech said use 2 magnets and 2000 ppm.
No idea if that is ball park or not.
I am running a zetec as well.
Can't wait to try it out, but I still have a lot of wiring to do and it takes a while to do a decent job.
thanks again
Jim
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"

[jimf909]

To extend the wires from the engine bay I used Ancor 8 conductor signal wire:

https://www.ancorproducts.com/en/158010

West Marine sells it by the foot...
https://www.westmarine.com/buy/ancor--20-8-round-signal-cable-by-the-foot--541748


The RF receiver box that receives signals from the wireless steering wheel control and cutoff switches and the Ancor wire...

Routed through the grommet below the vents...

[/img]
_________________
- Jim

[jimf909]

Dip switch positions...

Mounting bracket...

Throttle body...

_________________
- Jim

[jocoman]

Great thank you.
What are you using for VSS? I am going with the Rostra and 2 magnets.
Cheers
_________________
'86 Westfalia 2.0L Zetec
'97 Volvo 850 AWD Turbo
" The fun never stops"