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Hap CarlsonHap Carlson

Access to ground wire under mast base on Commander 410?

Hi friends. I am missing the third wire (ground/neutral) that should be protruding through the mast base of my 1977 410 Commander. The other two wires shown are for the anchor light and the other is for the steaming light. My question: is anyone familiar with how much access to wiring there is under the mast base? I need to find the ground wire under that base. Alternatively, I could pull the headliner down in the galley in an attempt to gain access to the wiring under the deck. But, I am trying to avoid that. FYI, I tried to get a remote camera down through the hole in the mast base but it is very tight and I really can't see what is under there. I'm guessing the mast base is sealed to the deck with 4200 or 5200. Any help you can provide will be greatly appreciated!
Hi friends. I am missing the third wire (ground/neutral) that should be protruding through the mast base of my 1977 410 Commander. The other two wires shown are for the anchor light and the other is for the steaming light. My question: is anyone familiar with how much access to wiring there is under the mast base? I need to find the ground wire under that base. Alternatively, I could pull the headliner down in the galley in an attempt to gain access to the wiring under the deck. But, I am trying to avoid that. FYI, I tried to get a remote camera down through the hole in the mast base but it is very tight and I really can't see what is under there. I'm guessing the mast base is sealed to the deck with 4200 or 5200. Any help you can provide will be greatly appreciated!


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Charlene  Pike
Charlene Pike
Oct 11, 2025

Hap, a possible source for the light

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