2001 Toyota Sequoia battery, altenator or loose/ bad wire?

Sounds like you have a bad battery. If it ran properly and all the electrical stuff worked after it was started, then that eliminates the Alternator. The battery can be tested at a local parts store (usually for free). They will charge it and load test to see if it is bad. It could also possibly be dirty battery terminal ends. Even though the connections do not look dirty, the battery terminal connections could need cleaning.

check your ground connection on your battery to make sure it is tight. charge your battery up all the way, and have it load tested. this will tell you if the battery is bad. if the battery is good, you can test the alternator with a cheap multimeter from the autoparts store, or they can do it for you. for this test the car will have to be running. then you set your meter to volts DC and hook it up to the battery red pos and black to neg. you should read 14 plus volts, if not, then your alternator is bad and not charging your battery.

My 2002 Toyota Sequoia SR5 had the battery discounted for 5 day for work to be done . When everything was done the only thing not working was the radio , which was working fine before it was disconnected. I have checked all the fuses and have power to the radio . I was told by Toyota service I had a bad radio . Also this year has no codes . The radio is blank nothing on the screen. Any suggestions ? Thank you

Hey everyone, this is seems to be a huge problem with the Toyota Sequoia from 2003 on. The same issue happens to multiple of these vehicles, and the only thing I've got, after I've had the battery tested for time's bought a new one and had all the wires checked for corrosion and any type of misalignment, it's that maybe there's a solenoid bad in the starter.