Retz Posted August 31, 2017 Report Posted August 31, 2017 Hey guys, I'm in the process of a panel upgrade, and doing the fun disassembly process. What are the mass of yellow black wires going to, this is a stock panel from SN 86 M20k 25-1028? They were attached into radio harnesses and are going to pilot side wall up under the windshield (out of sight). I suspect/hope this is going to a common ground board. Then I can use it for wiring grounds in my approach fast stack. Cheers Joe Quote
MB65E Posted August 31, 2017 Report Posted August 31, 2017 That is an unfortunate mess. Do they go through the firewall? If they do they might be to an old engine monitor. As those are normally black and yellow from some manufacturers. Quote
N201MKTurbo Posted August 31, 2017 Report Posted August 31, 2017 The yellow wires are typically the lighting buss. The black wires are probably the associated grounds. Or they could be something else... Quote
OR75 Posted August 31, 2017 Report Posted August 31, 2017 those wires are probably running to the avionics rack in the back. Open the side panel (the one to access the battery) If they are not ending there then they must go to the wings and I my guess would be for strobe lights / sync wires Quote
ArtVandelay Posted August 31, 2017 Report Posted August 31, 2017 That is an unfortunate mess. Do they go through the firewall? If they do they might be to an old engine monitor. As those are normally black and yellow from some manufacturers. I can count 7 yellow, if there is 8 I vote engine monitor (4 cht, 4 egt). Quote
Marcopolo Posted August 31, 2017 Report Posted August 31, 2017 I'm with Rich on this one, the wires do not look to be the flat(ish) thermocouple wires and are paired with the black wires. This is typical ground (black) and lighting buss (yellow) configuration in our panels. Ron Quote
kortopates Posted August 31, 2017 Report Posted August 31, 2017 If they are OEM wires then they have a coded label. The code identifies function and numbers make it unique. You can map the code to the Mooney schematic to see exactly what it is and where it goes- if OEM.Sent from my iPhone using Tapatalk Quote
Cruiser Posted August 31, 2017 Report Posted August 31, 2017 to further the Mooney wire coding info which is printed directly on the wire insulation every few inches. My copilot Mic-Key is MK14B22 the MK is the identifier for Mic-Key 14 is an arbitrary number for this wire B is the code for which side of a plug it is connected (i.e. A side or B side) 22 is the wire size. Quote
Retz Posted August 31, 2017 Author Report Posted August 31, 2017 Great info. Thanks guys. I will figure out the code. They are from the avionics connectors, so I'm almost certain lighting and ground. Quote
carusoam Posted September 1, 2017 Report Posted September 1, 2017 Getting your hands on a maintenance manual would have the details if these wires are original to the airframe. Some MMs are posted in the files area of MS... good luck. Best regards, -a- Quote
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