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5. The wiring will be determined by the type of gauges you’re going to use. For the Ford Racing gauges, no wiring is provided and you’ll have to supply your own 18-gauge wiring. To consolidate the connections, we’re daisy chaining the power, ground, and illumination wiring by making pigtails with insulated female spade terminals as shown here. Follow the instructions included with the instruments to determine what each terminal is for.