I need a schematic or wiring diagram that shows what signals connect to each of the 3 leads on the wiper de-icer switch. I will be using a 5th gen TR4 wiper de-icer switch in my Tacoma to add heated mirrors. Anyone know how to connect this switch up without taking your dash apart and probing?

A link to the mod is list below for those interested:
OEM Heated Mirrors DIY mod - Tacoma World Forums

I can't use the factory Highlander switch the mod calls out because all my slots are full (Off-Road edition populates every dash switch location). I do have an extra blank down near the shifter that the TR4 wiper de-icer switch fits in. It's the right size, has a built in 15-min timer, and light so it will work perfect once I figure out how to wire it up. I spent $50 for the switch so I'm not interested in blowing it up via experimentation. Thanks in advance for your help.

The TIS FSM link in the mods sticky will take you to the schematic.

Here you go...I am not sure what you meant by the switch has a built-in 15 min timer, but I think the de-icer timing circuit on the 5th gen 4runner is actually in the "A/C Amplifier Assembly".

I can't recall off the top of my head but I believe when I measured the terminals in the switch it was just a momentary ON switched +12v signal.

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Thank you eddiebx. I was thinking the timer was built in based on feedback from others at TacomaWorld and the description of the switch on some sites.

Am I mis-labeling this switch to call it 5th gen? This is the switch I ordered (don't have it in my hands yet):
Part # 84871-35010
http://www.villagetoyotaparts.com/pr...487135010.html

See attached images.

Based on the schematic you provided, it doesn't look like the switch has a timer feature, but we can't be certain until I have it in hand and test it. Knowing how to connect it is valuable, so thank you for that.

Attached Images