Factory Five Racing GTM Supercar Assembly Manual page 193

Starting at the plug that connects to the fuel tank harness separate the harness that connects the fuel
tank to the main engine harness.
The ground wire from this plug runs through a junction before continuing to the loop connector. Trim
the extra wire off of the junction leaving enough wire for a splice.
On the round connector, there is a thin grey wire at terminal "S". Follow this wire back the same
length as the junction and splice it in from the tank side. The wire will now connect from the tank plug
to the chassis ground.
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