How do you replace the rear blinker? - 2000 Buick LeSabre

Your brake light switch is faulty,replace it.

You obviously have a bad connection somewhere in the taillight. Some trucks it is a common problem and the taillight circuit board is the problem.

Replace the bulb for the blinker that is not flashing. The majority of flashers will blink fast if one bulb is burned out.

These trucks are famous for faulty rear light circuit boards.Replace the circuit board.

You've got relay problem. Please replace your blinker relay

When a turn signal bulb is blinking fast, it is an indicator that a bulb is bad in the system. Replace the left rear turn signal bulb, then see if the left front blinker has gone back to normal. This is most likely your problem. Let me know if it is still a problem and i will help you fix it. Good luck

CHECK PIG TAIL AT RIGHT REAR TAIL LIGHT IF LOOKS BAD OR BURN REPLACE IF OK FIND FLASHER UNDER DASH AND REPLACE.

Check all fuses. Use a test light to check if there is current to the rear bulbs when flashers engaged. If there is, then replace the burnt bulbs. Check for ground at the rear lights.
Do the front marker lights work when engaged??

RIGHT BLINKER dead ,front,back, or both..???? If front works, and rear doesn"t (REPLACE REAR BULB).....and vice a versa....If rear and front both don't work replace the FLASHER ..Flasher is located in the FUSE block area.......Listen to the operation of the LEFT or RIGHT flasher operation and you should notice a dirrerence....

when you use the right turn signal, does it blink faster?. Could it be the bulb holder is damaged or rusty?