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Tire Wheel Fuel tank Automotive fuel system Vehicle

Motor vehicle Electrical wiring Hood Gas Automotive exterior
Old engine had a bad knock. I picked up a parts bike, had the engine running great while still in the ‘parts bike’ frame. Get the engine out of the parts bike and installed in the good frame. Start putting everything back together and I’m stuck with one plug left unconnected.
Kinda funny to get caught up on a plug after a swap, but dang do I want to be riding again.
All the lights, blinkers, dash work fine.
Only problem seems to be with the kill switch. Acts as it should in the ‘kill’ position, but fuel pumps/secondary butterflies won’t prime. Ignition works in the ‘on’ position but without the pump/butterflies ever priming.

I’m thinking it’s gotta be the plug, just where’s the other half.

(Also it’s an 03 engine swapped into an 03 frame so should be no problems with comparability)
 

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Welcome to the forum.

Look in the back of the service manual and there are several wiring diagrams with the wire color codes. Just match them up and it will tell you what it plugs into.
 

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This plug looks like the fuel pump plug.

Exactly like this the STVA plug with other wires colors, located not far from its. Easy to interchanged both for mistake. Check this.
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