Alternator conversion causes Master Switch fault ??
My 172-A got an alternator this week, but now the old generator light comes on, making the A&P (and PlanePower tech support) think that the Master Switch needs replacement. Master was working fine before the alternator went in. They have replaced some (original ?) wires through the firewall, and now all the amp readings are correct. What should that generator light do now that the alternator is in? I'm told it should just go on in the event of an alternator failure, but it faintly glows right after startup, goes away after increasing RPMs slightly, just like the generator, but quicker.
Cessna doesn't have any new Master Switches, so mechanic thinks he will get a Field Approval to put in a Cessna-supplied toggle switch, used after '65.
Would there be another switch be needed for alternator disconnection, in the event of an alternator failure? Do any older 172s have a 2-position Master? Sort of like the Landing/Taxi pull-and-pull-again switch? What's the rating on the Master, would the light switch handle a Master's load? I can get light switches, if they would work, or work out...??