Left front blinker works fast, the rear not at all. Left rear brake light doesn't work, but the right one does

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.

because of no light flasher on left side the front one will go faster .maybe the left rear light is burn. and brake lights are control by the brake switch on brake pedal hardware, might be unadjust

when you have a fast blinking light the front or rear turn signal is probably blown and for your brake light check your fuse.

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

yes, on multiple electrical problems like this the first thing is to check the ground circuits, in you case focus on the left rear

Usually a fast flashing signal is because one of the bulbs is burned out or shorted out. If the signal and brakes use the same light which many cars do then check the wiring to it and replace bulb. If burns out again then it has a short between the signal switch and the actual light or the brake wiring to it is shorted.

any increase in bink speed is direcly related to a bulb being burt out.

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....

check and replace the bulb in the rear left light, the fast blink is normal when the front or rear bulb is out, the brake light not working indicates which one is out

the blinker is behind o next to the brake pedalit coul be the problem brake ligth swich is ataached to bhe brake pedalhold by two screws o pins first check for groud o positive