HELP!!!! 67 bus dimmer info needed???

[Das Bus]

Anyone have a 67 split window bus?! Where is the dimmer and info on dimmer switch and or relay ? My bus seems to be missing a dimmer set up along with other this hard to figure out what you don't have or know! Is it in turn signal, floor mount relay ? I have know idea? And how does it work?

[BUSDADDY]

See the last part of the text for #6 here:



Here's how it's wired:



And here's the relay: http://www.cip1.ca/ProductDetails.asp?ProductCode=C24%2D111%2D941%2D583 (not sure what's up with thier description, it fits 67 too).