My 1994 lexus ls 400 keeps killing my batteries after a few months. I am told that it could be the starter

Bad battery. if fully charged should read 12.6 volts. bad connections to battery, faulty or dirty contacts in solonoid, starter motor running dry and needing a clean out and oiling

Thanks for choosing FixYa and welcome. Something is draining the battery, eventually killing it. Have you had starting problems in the past? Is the car cranking? Have you checked anything, such as alternator, terminals?

Tune up wouldn't hurt. replace the air and fuel filters too. And yes you most likely have a dead spot on the starter. It will only keep getting worse

this could be a starter or the enigtion swicth yes if you crank the key to long it will kill the battery.

I would inspect your wires at the starter. If you live up north then corrosion is bad, clean all wires going to starter. then clean wires to back of alternator. I seriously doubt that alternator is the problem, but if you remove it you can have it tested for free at most parts stores.

take the cover off and then ask assistant to turn engine over whilst you check the belt

Disconnect the battery.
Disconnect the wires from the starter.
Unbolt & remove the starter.
Bolt the new starter into place.
Connect the wires to the starter.
Connect the battery cables.

the starter is located in the valley under the intake manifold. you must remove the intake to access the starter. its a pretty involved job. when reassembling take your time and make sure that every wire is plugged in and every vacum line is connected.

CHECK THE IGNITION SWITCH FUSE.IF IT LOOK OKAY.I AM LOOKING AT THE IGNITION SWITCH.IT COULD BE OPEN.ITS NOT SENDING POWER TO STARTER.

Alot of the starters on the Lexus are located in the valley of the engine.

Good Luck!