QUOTE(DickSteinkamp @ Jul 16 2018, 04:51 PM)
There is a "cat" light is between the tach and the speedo. There is an "EGR" light between the tach and combo gauge.
Those two lights were hooked up to one or two systems which turned them on and off. The EGR light came on when a specific distance had been traveled. There was a special speedo cable that went from the output on the transmission to a gizmo in the passenger footwell foam. That gizmo counted up to some number, and turned the light on after some distance. There was a reset button on there to turn the light off. A short speedo cable ran from the gizmo to the speedometer.
The CAT light was either run off the same gizmo, or from a temperature probe in the exhaust. I believe there was a controller box of some kind in the rear trunk on the rear panel near the left taillight, and the light could be reset with a button on there?
Been a while since I have read the 75-76 owner's manual, though.
The Doc is correct, though--the "extra" light in the combo gauge is shown very clearly in the 914-6 owner's manual as the Sportomatic Over-temp Light. I've never gotten a good look at the instruments in a Sporto 914-6, but evidently that opaque panel was replaced by some gel like the other lights and had a warning light on it. Don't know where the mechanism that turned it on and off was, though.
--DD