I made a wiring harness for the clock/g meter using 22 awg wire. I had a terrible time the first time that I tried to wire the clock. The company that makes it sent me a connector with 4 short wires attached to it. The first version had only the connector and it was impossible to put the tiny wires into the connector.
After I attached the 4 lengths of wire to the short wires on the connector I installed the connector into the rear of the unit in the panel. Ther 4 wires are:
Black - goes to ground. I installed it to the avionics ground block behind the panel. The extension of this wire is black.
Red - This wire goes to the battery where it attaches directly. I did not attach it because I have to install a fuse and because I do not have a terminal connector the correct size. I used red wire to extend the wire from the connector and ran it through the service loop and to the battery compartment.
Green - This wire was extended by using white 22 awg wire. I tried to put green tracer on it with a green sharpie. This wire connects to a power source to power the backlight. The flight timer begins when power is applied to this wire. It requires a fuse. I ran it through the service loop and to the main aux fuse block on the drop down door where I intsalled it piggyback with the co pilot map lights.
Yellow - This wire was extended with a white awg 22 wire. I used yellow heat shrink to mark the wire in some places. This wire dims the backligh when it senses power. I will connect it to the position light circuit. I will have to extend it even further.
I took this opportunity to clean up some wiring and determine exactly the fuse block connections.
