I installed the new Master Relay with my new wire that controls it which I soldered to the back of the master switch. Success. Master Relay pulls in and reference voltage shows up at the voltage regulator.
Engine runs and voltage regulator works so main problem is solved. Both ignitions working. Avionics and EFIS are working.
All functions working accept the following:
• Master switch LED indicator does not work
• No LED’s working on any of the panel switches (avionics, landing lights, etc)
• Trim motor not working - fuse OK
• Stall warning not working - fuse OK
• Audible warnings in headset not working
My question - is there something in common for all these items to not have power? Does the master switch also power these items and the fact that it’s own LED doesn’t light mean its not passing power to these other items? When I had power surge from the defective Master Relay could it have damaged the master switch in a way I can’t detect with an ohmmeter? My suspicion is the master switch has an internal fault. I’m also thinking maybe sensitive electronic components got damaged.
Beginning to look like I need to replace the entire Control Board. Anybody have a Control Board left over from maybe a panel upgrade or engine conversion requiring different controls?
Again, any help appreciated…