EAA Rocks!
Do you belong to EAA? If not join. There are chapters near you and I am sure. You will find someone more than happy to help you. I took a stab, chapter 663 (LVK) might be close?
http://www.eaa663.org/
Good Luck, it is not that bad, just one wire, one circuit, one switch, one crimp at a time.
You could go to an avionics shop and ask around if someone wants to do some side work. However if they want to charge you by the hour, forget it. No offense to spark chasers (wiring avionics guys), but sometimes they want way too much to do simple wiring. It is not rocket surgery/ brain science.
![Roll eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
ITS JUST WIRES AND CRIMPS.
A systematic approach helps. Draw it out, label the wires, work on one system at a time.
Do you have a Boiler Plate Schematic? There are so many pre-done that will fit 90% of your plane you can just copy. This will save time. It is a must before wiring your plane.
You can look at it as if you have five electrical systems or parts:
The Battery/Charging System: Battery, Master Relay, master switch, Alternator, positive distribution Buss, circuit protection (fuse or CB).
The start system: starter relay, starter, starter switch.
Basic airframe electrical: Buss >> Circuit protection >> wire >> switch >> wire >> load (light, flap motor, avionics, boost pump) It's the same thing over and over.
Avionics (COM, NAV, Intercom, EFIS, GPS, Autopilot): Audio signal, Digital signal (transponder to encoder), radio control (PTT), indicator........
Ground: This is one of the most important. The "standard" and best practice is to have a dedicated ground buss on the firewall or behind the panel to ground all avionics and aux circuits. However some times for long runs to wing tip or tail for lights, for example, it is OK to use the airframe for ground. There is some good threads on how to do this best. Many electrical gremlins are cause by poor grounds, so don't short change this.
Breaking each down and working on each separately can simplify the chaos.
It is common to give the avionics its own Buss separate but off of the basic Buss. Again there are "canned" schematics to be copied. A GOOD SCHEMATIC is step ONE if you don't already have one.
You may want to pay a Pro to make a wire harness for your avionics/EFIS if you have one. It gets a little more tedious to make the little pin crimps or solders and follow all the circuits, BUT STILL it is well within a mere mortal armature builder to learn and do a good job. It just ONE connection at a time. It can cost a boat load for a custom avionics harness. I looked into it just for fun once and the price was outrageous.
However if you want an avionics Harness try SteinAir. He has some stock or custom harnesses for popular EFIS and avionics; he has a great rep and charges a fair price.
http://www.steinair.com/
"One connection at a time"