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 TH Marine trim switch 
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Post TH Marine trim switch
I just installed the TH Marine trim switch and I'm getting a minor electrical shock when I activate the trim. It only happens when part of my hand is touching the handle or control box, and it's only on initial activation or releasing the switch, but not while it's trimming up and down. Thoughts?

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Mon Aug 27, 2018 6:24 am
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Location: North Alabama
Post Re: TH Marine trim switch
Check your wiring, you either have a hot wire shorting to ground. Or you could have a ground issue, causing an unbalanced load.

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Mon Aug 27, 2018 2:17 pm
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Post Re: TH Marine trim switch
I checked for the hot wire shorting, but can't find anything. The switch is a 3 wire harness (up, down, power), and there's no ground. Not sure how I would ground it since it's a sealed plastic housing.

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Mon Aug 27, 2018 3:19 pm
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Post Re: TH Marine trim switch
From your description, I'd check and make sure you didn't offer tighten a zip tie etc. Have you tried it while it's not physically connected to the metal handle. It sounds weird, but electricity will take the path of least resistance, and any unbalanced load could be felt. It could also be a faulty switch, first check it un mounted to see if you get the same results, and report back.


Also, are you using relays or just the switch?

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Mon Aug 27, 2018 4:13 pm
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Post Re: TH Marine trim switch
I can't find any issues with the wiring, and as long as my hand isn't grounding on anything metal when I push the button, there's no shock. The old switch was a metal toggle, that I assume would have grounded itself when attached to the control box. Should I have somehow run a ground wire somewhere?

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Tue Sep 04, 2018 6:49 am
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Post Re: TH Marine trim switch
Yes, try grounding the switch. Sounds like you are getting shocked my the unbalanced load. That is when you are properly grounded.

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Tue Sep 04, 2018 7:27 am
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Post Re: TH Marine trim switch
Just an FYI... TH Marine has shipped a replacement to me, no questions asked. My emails were answered almost immediately, and they were extremely helpful.

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Thu Sep 06, 2018 6:52 pm
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Post Re: TH Marine trim switch
Update... It was a bad switch. New one works perfectly.

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Tue Sep 11, 2018 6:48 am
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Post Re: TH Marine trim switch
Good deal!

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Tue Sep 11, 2018 7:32 am
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