Need a spare 12v and gnd conection for my tach..

So at last I tried the electronic FZ600 tacho that (after much swearing)I shoe-horned into the XJ550 cluster. I figured I would be able to pick-up the required GND and 12v in the headlight shell but it does seem that simple. In the end just to test it I connected to the PO light connector and lo - it works ! The tach signal is soldered into the right hand coil prmary (grey wire) so I could also pick up the 12V from under the tank or even back to the fuse block but I have no spare fuse ways (should have thought harder about that one..). If anyone with an encyclopedic knowledge of teh 550 seca wiring has a thought please let me know...

 

The signal circuit should have amps to spare for that. If not, then you can add a dedicated fued circut direct to the battery.

 

the power for the tach and speedo comes from the main fuse (part of the always on lights)
meter lights are connected to the headlight relay for power and share a connector with the reed switch for ground


http://www.frankjohansson.com/stuff/xj550/XJ550ElectricalDiagram.html