The only legal way to acquire that information would be to obtain the factory service manuals for the car. You might get lucky and find them on eBay (digital versions are not legal version of that manual -- paper only). You can also order them from Lexus through a Lexus dealership for approximately $150.
Has to be a short in the wiring or where the wiring is connected.
Yes
You have to remove the center dash panel to get access to the bolts, screws.
How do you install a oil pan gasket on 1995 Lexus sc400
I use the Denso plugs in my SC400
Yes they will
You can reset a maintenance light on a 92 Lexus SC400 by disconnecting the battery. Leave it disconnected for 10 to 15 minutes.
Yes
5w30
250hp @ the crank
$41,139
Yes you can.