Toyota Combination Switch
The combination switch is the group of switches that control your turn signals, your headlights, your wipers, and your horn. These are all intended for your safety. Sometimes as they fail they go through an intermittent phase where if you fiddle with them just right you can get them to work.
You need to be able to count on their working consistently without your being distracted by having to fiddle with the switches, and if they are failing, I encourage you to replace them.
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