1980 C182Q Ser #18267373 Electrical Problem/Problems To date my partner and I have replaced the battery, the alternator (after my partner had to hand prop the AC at a remote airfield)the alternator circuit breaker, the master switch and master contactor in an effort to solve the following intermittent problem/problems. Scenario 1-- Occasionally prior to start nothing comes on line when the Master switch is turned on. Using a volt meter there is no indication of voltage to the bus. After a short amount of time with the switch on, the system comes on by itself. Scenario 2--With the master switch on, engine not running, the system shuts down by itself. Recycling the master switch brings everything back online. Scenario 3--With the engine running and the ammeter operating what appears to be normally, the ammeter needle goes to one needle width on the discharge side and goes inop. When a load is put on or taken away ie flaps up and down, lights on and off the needle stays fixed one needle width left of center. To bring the gage back into operation it is necessary to recycle the Alt switch. This fixes the problem sometimes for only a short time and sometimes for many minutes or even the duration of the flight. When this condition happens a digital volt meter on the cigar lighter shows 28 +/ - volts. Scenario 4-- Occasionally the cylinder head temp gage also drops off line. This happens even after our mechanic has checked the probe several times. At this point we are starting to think that we have more than one problem. We are thinking that we might have a wire issue from the master switch to the master contactor and a separate ammeter/ cylinder head gage problem. HELP!!!!