SkepticalJohn Posted June 26, 2017 Report Posted June 26, 2017 Does anyone know the location of the fuse that supplies power to the overhead cabin lights for a 1980 M20K 231? Mine went in for annual inspection with all of the lights working and came back home with all of the front and rear cabin lights inop. Maintenance was done 6 hours away and they deny screwing it up, so returning to them isn't going to happen. All circuit breakers are in and I've checked some of the bulbs, which were okay. I'm guessing, since the lights receive constant power, someone has accidentally shorted a wire and popped a fuse before disconnecting the battery. Thoughts? Sent from my SAMSUNG-SM-G935A using Tapatalk 1 Quote
jetdriven Posted June 26, 2017 Report Posted June 26, 2017 (edited) The aft inboard corner of the battery. Coming off the battery contractor is a 6" long wire with a black inline style fuse holder in it. Inside is a glass fuse that blows. Edited June 26, 2017 by jetdriven 3 Quote
SkepticalJohn Posted June 26, 2017 Author Report Posted June 26, 2017 jetdriven is 100% correct - 10A glass fuse was exactly where described. Thank you sir! Sent from my SAMSUNG-SM-G935A using Tapatalk 1 Quote
carusoam Posted June 30, 2017 Report Posted June 30, 2017 The power of MS... question asked... t0 question answered... t0 + 12 minutes answer put into effect... t0 + 50 minutes That is pretty quick! Go MS! Best regards, -a- 1 Quote
231LV Posted June 30, 2017 Report Posted June 30, 2017 ...I removed the bulbs after bumping the "on" cabin switch for the second or third time when climbing out during the day and draining the battery. Unless you do lots of night flying with passengers, I found the lights are not worth the hassle and risk of a drained battery. Quote
DonMuncy Posted July 1, 2017 Report Posted July 1, 2017 Or you can have your hangar elf install a timer into the light circuit. Quote
SkepticalJohn Posted July 1, 2017 Author Report Posted July 1, 2017 Mine has guards over both the front and rear switch. I've never accidentally bumped either. Sent from my SAMSUNG-SM-G935A using Tapatalk Quote
jetdriven Posted July 1, 2017 Report Posted July 1, 2017 15 hours ago, DonMuncy said: Or you can have your hangar elf install a timer into the light circuit. Where could these elves find this timer circuit? Quote
DonMuncy Posted July 1, 2017 Report Posted July 1, 2017 Timers that operate for a minute or so are easy to find. Finding one that stays on for about 10 minutes or so (in my opinion, about the proper time to allow you to unload the plane) are impossible. With some help from some electronic gurus smarter than me, I designed my own. (I tried to attach it, but I don't know whether it was successful. If it doesn't go through, email me and I will send it that way. d.muncy@sbcglobal.net ) If you are electronically inclined, it is not difficult to build, and install. If not, I will turn you out one for little over the cost of the parts. If a Chinese company was turning them out, they would probably cost about $5. I got about $35 in mine. Final timer circuit.doc 2 Quote
carusoam Posted July 2, 2017 Report Posted July 2, 2017 Lawyer, machinistic, electrical idea man, and computer genius that flies a Mooney! Don, your skills are amazing! The link works. Best regards, -a- Quote
FlyWalt Posted July 2, 2017 Report Posted July 2, 2017 7 hours ago, carusoam said: Lawyer, machinistic, electrical idea man, and computer genius that flies a Mooney! Don, your skills are amazing! I agree. Don Muncy is pretty darn brilliant. Thank you for your help in the past Don :-) 1 Quote
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