Where is fuse for moonroof of 2000 lexus rx300

Question edited for clarity, add maker.
Question moved to model category.

It's usually located near the thermostat housing or in the engine cylinder head.
Dec 17, 2020

Lexus RX300 Engine Coolant Temperature Sensor ...

check fuse 50 in the engine bay. I think it wrongly attributed to the 'rear defogger' which is already mentioned in the internal fuse box as fuse 43.

https://fuse-box.info/lexus/lexus-rx300-xu10-1999-2003-fuses

also check the contacts on the windshield for continuity.
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hi Ale.
this link should help you find out.but it does depend on the brand/type of spark plug you use.
Get the Best Priced Lexus RX300 Spark Plugs
or this one.
NGK Lexus RX300 Spark Plugs
or this one.
2000 Lexus RX300 Spark Plug

This depends upon the brand/type of spark plug used.
NGK Lexus RX300 Spark Plugs

It could be caused by many things, but generally it means that your engine is running too lean - usually indicating a vacuum leak. It could also be that the O2 sensor is bad and giving a false reading.

Unplug window motor connector and test for voltage at the plug, while operating window switch. The age of the car warrants the window switch replacement (2000)

what size of bulb for the moon

Here is a link to the Lexus site and the free manuals for your RX300...
https://secure.drivers.lexus.com/lexusdrivers/info/my-lexus/resources/submit-owners-manual-search.do

Remove 3 - 4 screws on fender cover close to side marker light. Pull fender cover out a bit for you to use your other hand to reach side marker light. By twisting on one direction and here you go the light out. Replace new bulb and replace everything on reverse order.