K resistor between this wire and +12 volts. If you have a rev. limiter fitted, then it is much better
to provide a separate trigger that is independent from the ignition. (Please contact Farringdon for
advice on sensors that you can fit to your engine for this purpose. When the engine is running
faster than the rev. limiter should allow (on a change down at too higher road speed for example),
the ignition pulses are very irregular and will cause the tell-tale to record an incorrect (usually off
the scale!) figure. Apart from alarming you, you will not be able to make sensible decisions about
any damage that may have been caused to the engine.
Blue and Grey Wires or Green and Yellow
Connect these wires to the red wire of the shift light. Connect the black or blue wire of the shift
light to ground. The shift light outputs are positive 5 volt, 50 mA signals that are designed to
drive the LED shift lights supplied by Farringdon. Do not connect filament type lights to these
outputs—it will not drive them!
Orange/Blue Wire
Connect this to the lighting supply - a supply that switches to 12 volts when the lights are on.
2.3 The Push Button (Grey and Pink wires)
The push button should be mounted where you can reach it while being able to read the tacho. If
other people are going to drive the car you may wish to put it somewhere hidden so that the
tell-tale cannot be reset easily! The push button requires a 12 mm diameter hole. Fit the
sealing cap to keep moisture out of the switch.
2.4 The Shift Lights
The supplied shift lights should be fitted where they will catch your eye while you are looking at the
track or road. Try various places (holding them in place with tape) before deciding where to
mount them. The black plastic bezels push into the dash from the front and are held in place
when the LEDs are inserted from the back. The hole size for the bezels is 14 mm diameter.
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