The following photos show what the various wires are connected to on an SPF GT40. If you do your own install and you have no idea where all the wires connect, look no further. In figure 4 the black and purple wires are for the fuel pumps. BOTH of these wires are +12 VDC. You need to run a separate ground. THE BLACK WIRE IS NOT A GROUND.
SPF GT Wire Labels
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