NicoN Posted March 1, 2021 Report Posted March 1, 2021 Is there a hot wire (permanently 12V) available somewhere at the panel? As far as I understand the schematics there should be a hot wire at the master switch and the master switch actually is connecting the master solenoid to GND. Is this correct? Quote
David Lloyd Posted March 1, 2021 Report Posted March 1, 2021 Master solenoid gets it's power from the battery side contact and yes, the master switch connects the master solenoid to ground. Starter solenoid is opposite. Quote
ArtVandelay Posted March 1, 2021 Report Posted March 1, 2021 There is a hot wire for the clock in my schematics, so find your clock and see if that connection is there. 1 Quote
carusoam Posted March 2, 2021 Report Posted March 2, 2021 Be sure to know how much amperage you need... Computer memory doesn’t take that much... be careful what you attached to your clock and radio memory... Some Mooneys have an unswitched Leg.... that powers interior lights and the cigarette socket... That can be a pain in the but.... when the kids leave a light on.... or somebody accidentally hits a switch getting things out of the baggage area... or the SkyRadar gets left plugged in... It wouldn’t take very much to properly add what you want... PP thoughts only... this stuff only happens to other pilots... Best regards, -a- Quote
NicoN Posted March 2, 2021 Author Report Posted March 2, 2021 18 hours ago, ArtVandelay said: There is a hot wire for the clock in my schematics, so find your clock and see if that connection is there. It is exactly for our clock.The clock is battery driven, but uit is always a lot of work to change it. I have to remove the DG to pass the clock through that hole. Quote
Yetti Posted March 2, 2021 Report Posted March 2, 2021 Ignition switch is on a breaker. To energize the Starter Solenoid. There may be dioded circuit on the start circuit that energizes the Com Relay that turns off the Com Bus during start. Quote
A64Pilot Posted March 2, 2021 Report Posted March 2, 2021 Now, I’ve not worked on Mooney’s before so this is a general aircraft statement. But there should be a battery power wire already in the aircraft as electric clocks are common, and if memory serves correctly this wire is required by FAR to have within 1 foot of the battery to have a circuit protection device, most often a simple cartridge fuse. Nothing else that I’m aware of should remain “hot” with the master off. However I concede that I’m used to working on older type aircraft and these modern glass displays may have a keep alive power similar to a clock, but would expect them to still be fused within one foot of the battery if they were. Quote
PT20J Posted March 3, 2021 Report Posted March 3, 2021 I'm beginning to wonder if I have too many "hot" circuits. There is the standard one for the clock and cabin lights. Then there is the one to the ELT for the GPS connection. Another got added for the Battery Minder plug. Then I added one for the SureFly. All have inline fuses. Maybe I need a circuit breaker panel in the equipment bay. Skip Quote
ArtVandelay Posted March 3, 2021 Report Posted March 3, 2021 I'm beginning to wonder if I have too many "hot" circuits. There is the standard one for the clock and cabin lights. Then there is the one to the ELT for the GPS connection. Another got added for the Battery Minder plug. Then I added one for the SureFly. All have inline fuses. Maybe I need a circuit breaker panel in the equipment bay. SkipYou’re not supposed to stack more than 3, so I think a mini fuse panel would better. Quote
PT20J Posted March 3, 2021 Report Posted March 3, 2021 19 minutes ago, ArtVandelay said: You’re not supposed to stack more than 3, so I think a mini fuse panel would better. Do you mean on a stud? 43.13-1B 11.98f says "The number of terminal connections to a terminal block stud does not exceed four, unless specifically authorized." I'll have to look but again, but I don't think all are on the same stud. Skip Quote
ArtVandelay Posted March 3, 2021 Report Posted March 3, 2021 Do you mean on a stud? 43.13-1B 11.98f says "The number of terminal connections to a terminal block stud does not exceed four, unless specifically authorized." I'll have to look but again, but I don't think all are on the same stud. SkipYes, 3 or 4, still exceeds it when you include main wire. I guess you could stack a few on the master relay stud. Quote
PT20J Posted March 3, 2021 Report Posted March 3, 2021 Just now, ArtVandelay said: Yes, 3 or 4, still exceeds it when you include main wire. I guess you could stack a few on the master relay stud. Thanks for pointing it out -- I wouldn't have thought to look it up if you hadn't. I'm constantly amazed by the stuff I don't know. I know that the SureFly and the Battery Minder are on the master relay stud because I did this myself. I think that Mooney put the clock/lights on the battery terminal. I can't remember where the ELT connects. Bit it would sure look nicer with a fuse panel. Skip Quote
carusoam Posted March 3, 2021 Report Posted March 3, 2021 Somebody posted a pic of a fuse panel they have in the tail cone... Probably a long body, with all the equipment to support the two battery system... +1 for fuses being close to the source of energy... you never know when the insulation will wear off a wire... Best regards, -a- 1 Quote
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