2003 Lexus ls radio won't come on after battery

Might have blowin fuse check your fuse box for ant broken ones

crank shaft position sensor

Are you saying the engine cranks but won't start, or the engine won't crank ?
If the engine does not crank, you would check for voltage at the starter, the neutral safety switch, and the key switch as well as the ground connections.

My 2001 Lincoln ls cruise control will not work. Put in a new clockspring and that did not fix it. radio controls and horn work but the air bag light stays on continually after starting. The lights on the cruise side will go on an off -I have bought that part to replace but don't want to put on if that is not the problem.

leave off starter wire or put one in wrong place

Are there any warning lights on in the dash, may a security warning light? If so you will need to reset the security system, refer to the owners manual or callthe local Lexus dealer for instructions.

Sounds like a dead battery to me. You will probably need a new battery, a new alternator, or both.

Oil change won't hurt...watch out going over your scheduled oil changes. It's a 90 LS 400, It's been around.

if you can get the radio out of dash there is a serial number on the top of radio call lexus number in the owners manual and they can retrieve the code or they will put you in touch with tech support. This way you dont have to go to the dealership and pay hefty charge for the two do three minutes work.

SOUND LIKE THE STARTER SOLENOID OR STARTER IS DEFECTIVE.REMOVE THEM HAVE THEM CHECKED OUT.AT ANY AUTO PARTS PLACE.REMINDER TURN OFF RADIO SO YOU WONT LOSE RADIO CODE WHEN DISCONNECTING BATTERY.