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Turn on that fast blinking signal light and check to see if the front and rear signal lights are both working, chances are you have a burned out bulb. If both front and rear bulbs are flashing fast, replace the flasher relay.
light is burned out
the flashers will click to fast because of to much electricity back to flasher, this is telling you you have a bulb out somewhereeither a front or rear directional bulb
Probably burned out bulb in rear one. AJ
you have a light out that way it signal fast
The turn signal and brake light use the same bulb. When you get a fast flash, it is from a reduced electrical load being placed on the flasher unit due to a burned bulb. Replace the bulb and this should fix your problem.
Start by checking to make sure you have the correct size bulbs installed. If they are correct then replace the flasher relay. It is located Front seating area, driver side, under dash, mounted on top of brake pedal. If that does not cure the fast flashing, you may have a bad ground connection or the turn signal combination switch may be bad.
The flasher relay in the tow vehicle needs to be replaced with a heavy duty one.
Check the bulb, it could be blown.
Turn signals that do not work is almost always, a blown fuse, bad bulb, corroded socket, or a defective flasher relay. If the lights come on but do not flash, it is the flasher relay. If the light does not come on, the bulb is bad or the socket is corroded. If one light flashes very fast then your front/rear light may be burnt out. If no lights come on, then your fuse is blown.
One of the front blinker bulbs is burnt out. Replace the bad bulb and the blink should function normaly. you have a front right turn signal bulb that is burned out. the resone it blinks fast is there is less load on the flasher .
Turn signal flasher