Margate330

For anyone following along, plz check out @cdnewton video above.

To go any deeper, one would need the skills to do some electrical troubleshooting.

If the OP is up for it I can post the wiring info with notes but I don't suspect that's an option since he has a mechanic, otherwise I'd try to help.

A switch would work but it's not ideal, and I realize the suggestion was offered as a hail Mary last resort.

OP really needs someone to dig in and figure it out! 🛸

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DamnSkippy

I’ll take the wiring info if you’re willing to share it. I’m out of the country for a few weeks, so I can’t get to this until the end of the month.

I could not find a reference to a “ Main Relay” like the YouTube video posted above. I’m not sure there is such a thing on the RX330. I guess maybe it’s incorporated into the power block? Under the fuse box. Any suggestions for a “main relay” would be appreciated. I have a salvage yard nearby that has quite a few Lexus and Toyota’s, so getting a power block is probably possible. There’s always eBay too.

This car is worth less than $1500 I’m sure, so taking it to a Lexus dealership for a bunch of troubleshooting and the parts is out of the question.

Thanks to everyone for their assistance so far. Hopefully I can get this figured out and share the information with everyone else.

cdnewton

I am not 100% sure, but the youtube part number reference equates to "Blower Motor Relay".
Based upon that, I think the RX330 equivalent is:
https://parts.lexus.com/p/Lexus__RX-...870400283.html