Question about 2008 Hummer H3

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Rear turn signal rapid flash

Can't figure how to fix it

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  • 338 Answers

Rapid flashing is generally down to a bulb being out on the side it effects, due to the resistance being altered, does the side repeater and the front flasher flash fast as well? Try changing all bulbs on that side

Posted on Dec 31, 2013

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3 Answers

I have sourced out all fuses and bulbs, yet continue to have a rapid right turn signal. I don't know where else to look. help?


replace the right rear bulb. the quick flashing indicates a bad bulb. it could be a wiring problem to the rear for the signal light that you will have to check out starting at the socket and working forward.

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ARE YOU SURE THAT YOU USED THE RIGHT BULBS? IF REARS WORK AND FLASH RAPIDLY THE RELAY IS WORKING. A RAPID FLASH IS CAUSED BY A BAD BULB OR WIRING

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Definitely not the flasher, as long as it is flashing or blinking somewhere. Rapid flashing indicates a burned bulb, but since you already tried new bulbs in front, possibly bad bulb sockets, loose connectors, or a bad ground for the front bulbs. If you have a test light or voltmeter (multimeter), check for power at the socket when turns are on. If power then at the front, try new bulbs or trace the ground for those lights. If no power to the socket for turn signals, recheck wiring.

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If your turn signals flash rapidly that means that there is a bulb out. you said the front do not flash replace the bulb. If that did not fix it then you have a wiring problem that needs to be looked at.

Good Luck

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This is the indicator to tell you that either the front or rear turn signal bulb for the direction that blinks rapidly has burnt out. To test this, place the car in park and engage the rapidly blinking turn signal (the engine does not need to be running). Step out and look at the turn signals to find the culprit and go to the autoparts store to buy another (if you have the money, you should just replace both as the other may go out soon).

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1 Answer

Rear lights work when turned on. No brake lights or rear turn signals. Front turn signals flash more rapidly. Replaced both rear bulbs with no change


if you're getting a more rapid flash in the front you have a possible blown relay to the back. Check fuses first and see if those are out.

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1 Answer

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This fast flash is caused by a burnt out bulb in the front or rear.

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