How do l turn on/off dashboard light for toyota avalon xl 1998

the tumblers in the key switch maybe worn and require replacement. the key tumbler assembly will come with an new key.

Here is the manual section you can search for whichever fuse you need: http://www.toyota.com/t3Portal/document/om/OM22484U/pdf/8.pdf

Google '98 avalon traction control sensor location'. Should list a you tube video.

This engine has two knock sensors, one for ecah cylinder bank, both are located under the intake manifold, the manifold has to be removed to get to the sensors.

Make sure the parking brake is all the way released.

Same here... I have a 1998 Toyota Avalon XL. My car battery died. Replaced my car battery, but found out that when you unplug and plug the car battery with this car it engages in security mode (I have factory car alarm). This disables the engine and wont let you turn the ignition aka start the car engine until the remote (keyless entry) "UNLOCK" is applied. My remote is also lost so I cannot disable the alarm.
The only thing I can think of to do is unplug the battery again to disable everything (car alarms are annoying...) and call the dealer to pick the car up and perform the diagnosis. Most likely they will offer you another keyless (ugh... expensive) and/or you could ask to disable the factory car alarm.
I know thats not much help but it seems to be the only option from what I researched currently....

did you check the spare?

Look close at the car on the dash, is one of the doors open? How about the trunk? Fuel filler? Gotta be something like that.

This generally means that you have a problem with your brake system. I would try opening the hood and checking the brake fluid level on your Avalon.

try wiggling wires under the front seats ,if that dont work then take the builb out