Half of my electronics are non-functional.

[u/Ill-Product5933]

My 99 Lexus GS 400 with 205k miles had been subject to water damage as the previous owner had it sitting for over a year and water had been seeping thought the A pillar side. So far I've replaced all the fuses in both driver and passenger fuse boxes, did an interior swap, but here is a list of components that still do not function:

- Sunroof motor (had been replaced recently with a used motor but still does not open)
- passenger front and rear window do not open
- passenger front and rear door actuators wont's unlock
- passenger front seat (recently replaced with good conditon donor seat, airbag connections are good)
- AC not blowing cold, cabin air filter had been replaced
- passenger rear speaker
- rear decklid speaker

I know it's an old car that has been through hell and back but I wanna give it the tlc it deserves
How should I go about the diagnosis?

[u/ShrimpDevice]

I'd probably start looking at any areas where wiring harnesses and connectors under the carpet are involved. Also clean the sunroof drains if you havent already

[u/No_Yak2475]

You need to find out why they aren't working before fixing them. To do this, start at either end of their control and/or power supply terminals with a multimeter and work you way till you find either volts or a short. It sounds a lot like there's water pooling under your passenger seat and making its way into your door-jamb wiring loom, shorting any connections there.