Check battery connecters to see if they are tiightly connected. I had that some problem and it was the old battery connecters that where loose. I brought some new connecters and had the mechanic put them on. never had a battery problem even sense.
How much is it to replace an alternator for a Lexus IS 300
i need to know where the alternator is located on a 1990 Lexus LS400
Under the hood
Believe it or not, Interstate.
The alternator fuse on a Lexus is located in the rear of the engine compartment. It is housed in a water tight box along with many other vital engine fuses.
Likely the battery or alternator, but probably the alternator
Around $175.
Get it checked out by a Qualified Toyota Lexus mechanic.
The new alternator is bad happens all the time.
The alternator is on the drivers side of the engine below the dizzy cap and water pump.
show me the fuse panel for the 91 ls 400 an witch one is for the alternator
Because, you probably need to get it checked out