1977 johnson 115 wiring fix

[Jason_Rookey]

Need help with 1977 johson 115 wiring. I would like to get the guages working it's all a mess looks like aftermarket. If anyone could point me in the right direction. Spedometer tach fuel and looks like trim. All the wires look rigged with a plug that I have no plug in for.

 

[Bondo]

Ayuh,..... Welcome Aboard,...... Where, Exactly, do the wires go, from that plug,..??

The speedo usually attaches to a pitot tube, not a wire, unless it goes to a fish finder type paddle wheel transducer,.....

On some controllers, there's a plug-in on the forward face, to plug-in the tach wires,....
Is that what the black bit is on the forward face of that controller,..??

The fuel gauge should have a red power wire, a black ground, 'n a pink wire that goes to the sender on the tank,...

 

[Jason_Rookey]

The plug goes to the tach and then spits off over the place I'm not worried too much about the spedometer but would like to get the tach trim and fuel guage running. The black object on the controller is just the friction knob. Only black and red coming from sending unit. Looks like a green wire going from the fuel tank to the back of the boat as well. The trim guage is wired to a toggle switch like in the picture but there's a brown wire I assume this maybe goes to the guage? Would it be possible to hardwire the tach into the controller?