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Orange 20 gauge, pin 1 White Molex: Optional fuel pump relay trigger wire. Ground switched. We
generally don’t recommend using this function on aviation systems. Each fuel pump should have a
separate switch, power wire, fuse/ breaker and ground wire (not grounded to the same terminal).
Single ECU Wiring between the 16 pos Molex and Injector harness
(Dual ECU further down!)
These 20 gauge tefzel wires exit the ECU 16
pin molex connector are usually 6-1/2 to 10ft
long. 4cyl colors are black, red, green and
white, 6cyl wire colors are 2x black, 2x red,
and 2x white. These wires connect the ECU
injector outputs to the injector harness via
black Weatherpack connectors. Cover these
wires with your desired fireproof sleeve or
conduit. Route through the firewall, bulkhead
or baffling, but don’t trim length until you
check length of the Injector harnesses.
Watch wire color and cylinder numbering to
route to proper side of the engine. Below
Dual ECU info there are instructions for
crimping the Weatherpack connection to the
injector harness wires.
4 Cyl Single ECU
Injector output wire colors 4 cyl Single ECU:
Black to Cyl #1, Red to Cyl #2, Green to Cyl
#3, White to Cyl #4
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