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The first thing to do for your dash lights is to verify the fuses, if ok check your lights dimmer next. Sometimes, dimmers fail to provide good contact due to wear or poor filament contact. Otherwise, there is a poor connection somewhere.
Usually, a rapidly blinking turn signal is due to a burnt bulb on the side in question or a bad ground connection either in the front or the back of the vehicle. Turn the left signal on and check if front and back turn lights are on and working if one doesn't work check the bulb. If it is poorly lit and not blinking check the socket and ground connection.
Hope this helps you!
Fernie
What that rapid turn signal on the dash means is, the rear turn signal tail light is burnt out. This is how you know the bulb is bad. Replace the burnt out tail light bulb and you will be back to normal.
That is usually an indication of a blown bulb in the side that's blinking rapidly. Turn on the right side blinker and looking on the outside of the car, check all the bulbs that are supposed to blink and you will see on that is not blinking. Replace that bad bulb and the dash light will blink normally again.
Check grounding at start of the wires coming from under the truck you will proble find a corried ground wire whitch cause afeed back to other lights thus completing circuit.
The Trailblazers have a common problem with the printed circuit boards in the tail lamp housing.
Unplug the tail lamp housing at the wiring connector and test for power with a test light. ( With turn signals on) You may have an open circuit in the lamp housing circuit board. Good luck
Hello. The symptoms you are describing are likely due to a poor ground. Temporarily install a new ground wire by securing a piece of copper wire to the frame with a self tapping screw. Use this ground wire along with the hot wire to see if each of these lights works. If it does, trace the ground wire back to the frame, unscrew it and clean up the metal with emery cloth so you reestablish a good ground.
surely this didn't just happen one day. did you mess with the wiring harness or have someone mess with it . you can also check the fuses under the hood . you have some major stuff happening there. good luck
THE TURN SIGNAL AND FLASHER ARE TIED IN TOGETHER.YOUR FLASHER SWITCH IS ON THE DASH.ITS A ROUND RED BUTTON WITH A WHITE TRIANGLE ON IT.WHEN YOU PRESS THE RED FLASHER BUTTON ON DASH.IT WILL MAKE YOUR FRONT AND BACK SIGNAL LIGHTS BLINK.WHEN YOU WANT TO TURN OFF FLASHER THEN YOU PRESS THE RED BUTTON.IT WILL TURN OFF FLASHERS.
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