Headlight switch?

[sealw98]

First I like to say hello to everyone out there. The other day I was starting my truck and I pull the light switch, my dash lights were very dim, so I adjusted the knob and I lost all my dash lights. So I didn't think anything of it thought the harness might have pop out. Last night I noticed that the park lamps were not working. I wanted to know if the switch could be bad and if this is why all of my lights are not working? And does the light switch have anything to do with your turn signals not blinking?






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