AOG with electrical problem - help please!

[robw]

Thanks James & Karl. Appreciated.

We got it going today but we are not sure why. Which means that the probability of repeat failure is pretty good. We bridged out the field circuit breaker and proved it was not that. Finger of suspicion now rests on the alternator switch. Much cleaning of terminals in confined spaces in 33dC heat is not fun.

Old aircraft! Sigh!

[JamesC]

After it happened to me (and a problem with the landing gear horn sounding) I cleaned every blade and banana plug type connector I could find in the acft. Lots of fun. Battery switch is prone to internal resistance build up with minor internal contact arcing over the years also. Easy to replace both the batt and alternator switches - replaced mine.