Tachometer install on 1974 VW Baywindow Bus 

Wonderful video. Ingenious use of the test wire to the back. I never would have thought if that. Thank you sir!!!

thanks for the video.. I was looking to find which wire from the diagnostic port could be used as a spare wire to hook up my tach. Doing a subaru engine swap in a 74 bus. thank you. Blue/white wire!

Excellent video! Never knew there was a test circuit. My rear defrost doesn’t work anyway. 14 gauge wire to extend where you needed to?

I need to rotate the camera phone to horizontal next time...sorry for things being off screen sometimes. I could see everything on the phone screen when I recorded it!

Thanks for sharing your fitting guide with us as it will come in very handy for when I fit mine too. The only other non related question I was wanting to ask you was that you have a dash switch without and emblem to say what the switch is for below your tachometer and I have one exactly the same and haven't found out what it's for. I was hoping you could shed light on what yours is used for ? Thanks