2008 Mirror Upgrade Heat Function Wiring - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 09-17-2019, 08:01 PM Thread Starter
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2008 Mirror Upgrade Heat Function Wiring

Hello, I recently upgraded to power 2008 mirrors with heat and lights. The truck had none of this from the factory so I had to wire everything myself. I have not wired the heat function yet. I do not want to hard wire the heat to be on at all times, and I do not want to install another switch.

I was wondering if it would be possible to tie them into the climate control wiring so the mirror heat would be powered when my defroster is turned on on the dash. Is this possible? Has anyone had any experience doing this?
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post #2 of 4 Old 09-17-2019, 08:10 PM
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No I have not done this -- was thinking of a way tho

You could attach a micro switch to the defrost door actuator and use that to switch a relay connected to the mirror heat
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post #3 of 4 Old 09-17-2019, 09:34 PM Thread Starter
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Thanks for the reply, what exactly is a micro switch?
Thanks!
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post #4 of 4 Old 09-18-2019, 06:13 AM
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Micro switches are exactly what the name implies - they are rather small switches used in all kinds of things where space is a premium. You can find them on Amazon or any retail electronics store. They usually have 3 leads - a common, a NO, and a NC - when the switch is activated, the NO closes and the NC opens. You probably do *not* want to wire the heat lead directly to that - rather have it power a relay that sends power to the mirrors. You'll probably overload the switch and burn it fast.

They are notorious for breaking the actuator arm off of them.
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deforst , heat , mirror , upgrade , wiring

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