2fast2Z Posted May 5, 2009 Share Posted May 5, 2009 Hi All On the back side of my -73 speedometer, is a device, it looks as a relay, it have 3 wires, one goes to the face disc and the two other goes in to the harness, any one know what that thing is for. Next thing is that i like to put my KM/H Fairlady speedometer guts in the -73 housing, in the Fairlady speedometer is two wires coming out, one from the face disk and the other.....?, i really don't know, any one know what that is for. I think the speedometer is for a model with 260 -280Z dash. Chris Quote Link to comment Share on other sites More sharing options...
SCLOBERNOCKER47 Posted May 5, 2009 Share Posted May 5, 2009 No clue. Ill have to dig through my box of speedos to see what you be talkin about. Quote Link to comment Share on other sites More sharing options...
74660z Posted May 7, 2009 Share Posted May 7, 2009 It is an amplifier for a speed sensor that detects when the car goes under some speed to open vacuum solenoid. I forget its exact function, but it is an emission control. I have been chevy powered for years, but I recall it was never hooked up on either of my 6 cylinders. The thingy on your throttle body that looks like a fuel pressure regulator on a newer car. Quote Link to comment Share on other sites More sharing options...
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