A lot of the Odyssey engines have chuff with continous smoke. The switch currently only goes to chuff in on the radio board where is connects chassis ground to chuff in, pin 17. To turn the fan on and off synchronous with sound you have a few choices. GRJ super chuffer will accept the switch in and output to both the fan and radio board. Some of us use the switch to drive a double pole reed relay. One pole to the radio board and the other to the fan motor. Lastly use two micro switches on the cam with one still going to the radio board and the other to the fan. There is not always room for two switches and in some cases the cam is not wide enough, normally these cams only have two lobes so you only get two chuffs per rev. The cam gets replaced with a 4 lobe cam for 4 chuffs.
John has a turn key solution. The others require mechanical modifications that may include removing a driver to install a cam and requartering.
What you can't do is wire the single micro switch to both the radio board and the fan motor. One or the other, not both.
Pete
