Check the signal light fuse, the signal light relay, and the signal light switcher.
you need to buy a signal lights relay
You can use universal coolant which you can find in any auto parts store, or you can use a coolant for Japanese card, or you can go and get coolant at a local Toyota dealer.
The 1998 Toyota signal relay switch is located below the dashboard, on the drivers side. The signal switch simply plugs in and out.
There is a short in the signal light circuit.
There should be six signal lights on the mystique, two front, to rear, and two sidemarker lights.
You have to replace front and rear bulbs.
The warning lights on the dash of a 1998 Toyota Rav4 can mean anything from low fuel to brake problems or overheating. Each light has a unique image which denotes the specific problem.
You might have automatic system for that. It will come off after couple minutes. You have to remove keys from the ignition. If it's not a case check for shortcut current.
The warning lights on the dashboard of the 1998 Toyota Avalon are designed to tell you if your oil is low, if your gas is low, and if the engine temperature is too high. These lights help you to establish when the vehicle needs to be serviced.
sounds like a short in your fuse system.
The 1998 Toyota Corolla turn signal flasher relay switch can be found beneath the drivers side dashboard. The turn signal flasher relay switch will be above the gas pedal.
Try checking & replacing turn signal flasher, which is usually located underdash by your left knee if your sitting in the drivers seat. Good Luck...