2004 - 2008 F-150

2005 F150 Emergency Flasher Issue

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Old 07-26-2015, 02:44 PM
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2005 F150 Emergency Flasher Issue

All of my turn signals work fine turn on emergency flashers none work but one on drivers front...need help
 
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Old 07-30-2015, 04:29 AM
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Might be the flasher relay. Mine were hyperblinking (blinking really fast) until I replaced it with an EP27 unit.

It's found underneath the dash with a blue connector.
 
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Old 07-30-2015, 08:16 AM
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If it was the flasher, the one on the driver's front wouldn't be working either.

If the described symptoms are correct (all turn signals work, only LF lamp flashes in HAZ mode), the only thing that could cause that would be the multi-function switch which would require THREE internal points of failure.

I'd suggest double-checking the symptoms to make sure it isn't simpler. If they're correct, replace the MFS.
 

Last edited by projectSHO89; 07-30-2015 at 08:24 AM.
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Old 07-31-2015, 02:55 AM
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Originally Posted by projectSHO89
If it was the flasher, the one on the driver's front wouldn't be working either.

If the described symptoms are correct (all turn signals work, only LF lamp flashes in HAZ mode), the only thing that could cause that would be the multi-function switch which would require THREE internal points of failure.

I'd suggest double-checking the symptoms to make sure it isn't simpler. If they're correct, replace the MFS.
I think you are right on this one.
 



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