Piper PA32 wiring diagram
Hi folks,
Is there anyone that can help me with this 1973 Cherokee Six? It has landed at my local airport with an electrical fire and I have been asked to lend a hand in fixing it. I'm an overseas station engineer, B1 & B2, working on big jets. I have very little GA experience, but this Piper is N reg and I also have an A&P. The owner has a maintenance CD, but it doesn't have any wiring diagrams on it. I need to find out why the 60A alternator CB keeps tripping. With the battery master switch to off, there is a dead short from the CB to earth, but with it switched on it has 12V! That has really confused me and without a wiring diagram I'm just stabbing in the dark. Any help would be greatly appreciated. Cheers. |
What model number and serial and I will see what I can do.
Section X in the maint cd should have them at start |
Hi winglit.
You may be able to get the one at Bomar Flying Service: Downloads / Piper SE Service / Maintenance Manuals Hope it would work! :) FYI: It's free!! |
Those split Bat/Alt switches aren't very reliable; I'd look at that to start off with. I've stripped u/s ones down and the amount of contact arcing is an eye-opener. Much the same as an in-flight fire, I guess. :eek:
I'd look at the ammeter connections as well in case something's touching them. Like you say, a circuit diagram would help; I can't remember the Cherokee 6 electrical system but it's probably not much different from most light aircraft layouts. |
I agree, check ammeter. But then, Cherokees are known alternator eaters. The only time I have had to fix fire (smoke) in a piper was a pressurized PA31 and that was because some goon placed the alt. output wire on the turbocharged exhaust!
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Thanks for the help guys. That Bomar flying service link was a godsend.
The dead short to earth was a red herring brought on by my crap multimeter. These new digital ones really do give false readings as they have hardly no internal resistance. I wish I could have an old AVO like we used to use in the airforce! After replacing the the CB, alternator and fixing some bad wiring he was good to go. Cheers |
Wiring diagrams
Hi Akitmo,
back a few years ago you put up the following linkin response to anwiring problem: http://www.bomar.biz/download.php?list.65 I have been trying n successfully to download it. Can you assist please. In a nutshell I am building a Long Ez and have got a Rochester instrument cluster comprising fuel pressures, oil pressure & temperature and ammeter. My question is how to wire in the ammeter and whether it needs to have a shunt included in the circuit. If so, will a generic shunt from Aircraft Spruce fit the bill? Thanks in anticipation Kevin Kelly Kevkevkel (at) yahoo (dot) com |
Do you know what the cluster is out of?
Might help http://download.mdhelicopters.com/ET...tins/hn177.pdf |
Thanks. Problem solved. No shunt required.
Best wishes KK |
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