Hi,
I'm currently trying to install the three gauges that are missing: water temp, oil pressure, and voltage. For the most part, everything is set up but I'm having a difficult time connecting the wires.
Would anyone happen to have (or know where I can find) an electrical wiring diagram so it would be easier to hook everything up?
Your help would be much appreciated.

 

If you ever find one, I would be interested in a copy. The other automotive forums I belong to all have a site that has the diagrams available for their users. If would be nice to have the same thing for the Honda Fit.

 

What kind of gauges? Analog gauges would have their own sending units. Digital would connect via OBD II (even if they're sweep dials on stepper motors).

Modern cars are networked (Controller Area Network or CAN). The ECM is the central computer. The only aftermarket gauges I'm aware of network via the OBD II port to get digital output from the ECM. The dash gauges have their own controller or black box.

I have the shop manual for the 09 but it's about as useful as "connect this black box to this one via this bus."