Lexus i250 batter is good buy will not start or light will not cut on or no power and new. Batter

You need to check the fault codes with a code reader as a first step.

Yeah you need to buy and install new battery OK..then go from there..good luck

have the alternator checked OFF the car

there is an E Z WAY for you to find out what is roung with youer lights .go to youer head light there are three wires there find the bigs one an make a small hole in it now get a pice of wiure that isa long enuiff to go form the head light to the batter ,strap at lest 1hafe of an IN'to baer wire so that you will get a good conatch to the +poted of the batter an the ether end to head light big wire .now remanber that that wire mosted also be straped 1 hafe IN 'so when you put the wire form batter to the light threr will be power to the light if ther is light when you do this then the swithes.is bad ,,that mines get a new light switch .now if ypou dont want to drive in the drark'i hope this helps you out

You can buy replacement ends,label positive and negaative and then remove them and clean the battery with battery cleaner and terminals with a terminal brush, next is to cut the old ends off as close to terminal as you can, then strip covering back about an inch and then clamp it to new terminal and hook back to battery. heres a picture of the replacement terminal and the cleaning brush, good day.

Hello,
Check that battery connection again real real good. If your batter was just "a little low" then there is plenty of juice to at least run your lights. For every single thing to be dead with 0 response you have a failed power feed. Check all them big power wires and their corresponding grounds. This is your problem. But just to double check the battery charger you used you may try another batter if you have one and see if the response is different. Also make sure that cable that was corroded is not corroded where it is clamps onto the power wire. Cut that clamp off and install a new cable clamp as needed.
Regards, Tony

I'd run it by Autozone if this was the batter that was in it when the alatnator went out it may have cause the batter to get a bad cell, they will check it for free, Most batters have a 3 to 5 yr. warrenty. DONT tell thim your alatnitor went out if the battery showes bad this will void the warrenty just simpley say my batter has a bad cell....of corse the place you bought the batter will test it as well befor they give you or pro-rate your old battery good luck

is it while you are using your high beams, my is doing the same thing, tried wiring a toggle switch to suppement the turn/wiper stick instead of buying a new one. Worked great until i activated the momentary high beams while the switch was in the high beam position. Then power was cut to the entire car. Its like there was no batter. Can't find a single popped fuse or bad breaker, and the batter is good. Not sure what happened, according to the hanes maual i was wiring in accorance with, nothing should of happened like this.

sure the battery is good. ive put plenty of batters in *new* from the sore and they stil needed a juicing before they started..

sounds like you are putting a bad battery into the car...try a fresh battery.  Batter is spelled...battery