Right turn signal on won't turn off

When the turn signals quit working pull up , down , front to back an back to front on the turn signal switch handle . Do they work when doing this ? Pontiac had bad switch . The power for the turn signals goes through the flasher / hazard module . Could be the switch or the module.
The HAZARD LPS fuse in the left hand instrument panel (LH IP) junction block supplies battery positive voltage to the flasher module, which is part of the hazard switch assembly. The TURN LPS fuse in the LH IP junction block supplies ignition positive voltage to the flasher module. The turn signal lamps may only be activated with the ignition switch in the ON position. When the turn signal switch is placed in either the left or right position, current flow is from the flasher module's output to the turn signal switch assembly. The flasher module then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, all the turn signal lamps will flash including both IPC turn signal indicators.

no, but if your alternator is worn, your new battery will fail in a short time as well

Changing the power supply may have caused some current to the flasher relay. It may need to be replaced. Have it checked by a technician.

first check the bulbs on that side by visual or changing to the other side if you can't see that well if the bulbs from the front and back work or are good when checked the flasher has blown out on one side and you have to replace it other possible cause could be a broken wire for the right side lights so look at the connectors for that side front & back if all is good one more thing could do this the actual turn signal lever that you use to activate the signals could be bad for the right side especially if it does not go back to the normal position after making a turn and the steering wheel rotates back to it's normal position but the turn signal lever does not click back to the center position this would burn out that side from the signal constantly being on good luck stephen

Won't turn over? Do you mean the starter won't crank the engine over?

Or the engine cranks over and won't start, and you have tested for spark when cranking and have no spark? And then you have tested the coil and ignition module, and they tested out good? Am I on the right page here? If so, maybe the next thing to check would be the crank position sensor. The ecu (computer) signals the ignitor (ignition module) when to initiate spark after it digests the signals from the crank position sensor and the cam position sensor.

Throttle body position sensor (TPS), JUST locate the throttle body and you will see an electrical plug, RIGHT at the throttle butterfly, check if it's LOOSE or if there's anything WRONG with the WIRES, and go from there.
Normally, it will have like 4 wires, not sure about the color, but 1 is constant power, 1 is output signal, 1 is IDLE/Wide open throttle SIGNAL, and the LAST is ground.

Use a Voltmeter, hook the NEG-(black lead) to chassis or BATTERY NEGATIVE. The RED lead is probed into any wire to check for any voltage. ONLY perform this check when you have Ignition ON, means that you have power, but engine OFF. Do not take hours long you will drain the BATTERY.

Power wire will either be always 5V or 12V constant.
Ground will have ~0 Voltage.
OUTput signal wire will VARY as you work the throttle, start at 0.5 "ish" and 4.5V "ish at Wide open.
The idle switch signal should switch between maximum and minimum value as you work the throttle BACK and FORTH.

CHECK ONE AT A TIME.
IF NT working, look for a new part. IT's TOYOTA should not be EXPENSIVE.
FEEL FREE TO DESCRIBE what you find to me :).

When you say it won't start you mean it won't crank, right ?

If you have a duralast starter from auto zone, that may be the problem.
Aftermarket brand starters and alternators can be lemons sometimes.
A mechanic would check for voltage at the starter with the key in the on and start positions. Also check the ground connections.
Its possible the starter is not getting full battery voltage for some reason.

Not sure what the problem here is.
The codes are for the security system - - the key is not sending a signal or the right signal for the car to start.
Could be a problem with the lock cylinder which may have a sensor for the key inside it.

you need to replace the turn signal switch there is a tab on the tip that get pushed by a canceling cam most gm dealers can get it for you i have a couple but i don't ship or take checks

not unless the bulb is constantly burning out or their is no power to the bulb socket