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Auto dimming dash lights
I wanted automatic night dimming dash lights as described in this thread:
Dear Toyota, please fix this in the next production year of the 4Runner
So I ordered a light control sensor from eBay for under $13, including shipping. I made sure it was from a US distribution center so it would ship quickly. It’s a Chinese knockoff, but it has the same part number as the Toyota OEM. 89121-50020. If you look on Toyota websites it’s listed for around $120. That’s nuts; it’s a simple photo sensor.
New Automatic Light Control Sensor For Camry Corola Lexus LS430 89121-50020 | eBay
I carefully pried off the black plug on the front of the dash near the windshield. There’s a small electrical plug attached. Take it off and plug in the real sensor. I tested it before snapping it into the dash. With headlights on and the dimmer switch *not* clicked in the full bright position, by covering the sensor then shining a flashlight on it, I could demonstrate the light dimming action. Then I seated it fully into the dash.
Works well, I like it.
Interesting. In this case, does the dimmer dial influence the brightness at all anymore? Or, is it fully controlled by ambient lighting sensor now (besides the full brightness 100% click on the wheel)?

