1995 Lexus LS400 Questions

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Car runs fine otherwise. However, check engine and airbag lights stay on constantly. Does not cut off driving locally. HAve new spark plugs/wires. And yes speedometer needle come on after abt 20 mins on highway. Sometimes, between 35-45mph after starting out there is a slight engine buck.
I have a 1995 Lexus LS400 that will start in park and in neutral which is normal, However, when i try to shift into reverse the starter re-energizes and will not stop unless you shift out of reverse. Any ideas what could be happening here and if you know can you point me to a drawing showing where I need to go to get started fixing this.

I have been told to find the Neutral Safety Switch and 12V brake line because they may be shorting out...I do keep blowing rear brake lights.

I have been told to check the starter relay and the starter solenoid but I can't locate either to check.

Any pictures, schematics, 1st grade instructions for repairs(Im a Mustang GT chic and know very little about Toyotas and Lexus'), etc. I am trying to get this car ready to sell and I don't want to sell it like this so any little piece of info will be appreciated!!!
Car starts headlights come on but won't shift unless the reset button by the shifter is being pushed in

What seems to make the problem better or worse? Only shifts if reset button is pressed
How long have you had this problem? 1 day
It wouldn't move it's like I'm in neutral through all the gears
The alternator fuse link was burn out ,change it but after that radio, power trunk and alarm not working properly. All fuses good now
Also where is the shut off switch for the air suspension?
I have a 1995 Lexus Ls400 and the passenger side rear end air suspension is not working I was looking on ebay for the parts but I do not know if I should buy a conversion kit and replace all four and will that be all I need to fix it or will it be cheaper just to get a new air suspension and will I have to replace all four as well
I would like to replace the bulb.
My Ls 400 will idle all day long but as soon as I put it in drive and press the gas, it dies out but start back up immediately.
what else do I need to look for?? I really need an answer if anyone has one
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