Q: Brake/ tail lights

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My light failure sensor bad (burnt spot on circuit board), I got another one and after a few seconds it happened again so I simply bypassed the sensor (removed it) and for some reason both filaments light at same time in all 4 of the 1157 (brake/tail) bulbs ....they do get a little brighter when I hit the brake but it's not working like it should. Also when my running lights are OFF my dash lights dimm when i apply the brake but when my running are ON the dash lights are fine...please help if you can thank u

My car has 101000 miles.
My car has an automatic transmission.

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