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  #1  
Old 10-22-2008, 06:52 AM
nd925 nd925 is offline
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Rapid Blinking Turn Signal

Hey guys, has anyone come across this before. When I turn on the left turn signal it flashes about twice as fast as the right one. The right one flashes normally as it always has. Could this be the turn signal relay going or something else? Anyone pinpoint the whereabouts of the relay? I'm guessing it's under the dash somewhere. Thanks in advance for any help.
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Old 10-22-2008, 07:08 AM
pgw85706 pgw85706 is offline
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Usually a burned out bulb.....check that first.
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Old 10-22-2008, 07:43 AM
nd925 nd925 is offline
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Thanks for the quick reply. I did check that, both the front and back signals work, just flash much quicker than normal. Could the bulb still be an issue even if it flashes?
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Old 10-22-2008, 08:13 AM
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Yes, the bulb can still flash and be at issue. And I agree, it's probably a bad bulb. You can also pull them out and check for moisture and corrosion in the sockets and harness connectors.
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Old 10-22-2008, 10:08 AM
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Also, if you use LED bulbs, they will flash more rapidly.
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Old 10-22-2008, 11:47 AM
Slim Shady Slim Shady is offline
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I had that problem on my expedition, and I thought the bulbs, too. They al looked good, but I replaced them anyway, but I still had the problem. It ended up being the flasher module itself.
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Old 10-22-2008, 12:14 PM
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Thanks for all the input. I'll start with the bulbs and go from there.
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Old 10-22-2008, 02:17 PM
wtroger wtroger is offline
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It can also be caused by a short in the wiring on that side. The more eletrical load the faster the flashing.
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Old 10-22-2008, 03:52 PM
hydro_37 hydro_37 is offline
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Either a bulb or flasher would be my guess. Both cheap fixes anyway.
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Old 10-22-2008, 06:50 PM
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Also, if you have a trailer wiring harness, be sure to check that. It actually has a module on it. It went bad on our 94 ranger, and we had all sorts of problems.
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Old 10-23-2008, 02:15 AM
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Had the exact same problem on my 95 Taurus, but the emergency flashers worked normaly.

If yours is wired the same as my Taurus, it will have a single electronic flasher which operates flashers & turn signals & if the emergency flashers work fine, the multifunction switch is probably the culprit.

Thats what the problem was on my Taurus
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Old 10-23-2008, 11:19 AM
87 XLT 87 XLT is offline
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Should have mentioned that the way I knew the multi switch was bad was to simply check the resistance thru the switch.

In the right turn circuit there was no resistance equals good.

In the left turn circuit there was high resistance which equals a bad switch.

50 bucks for a new switch & a couple minutes to install it & problem solved.

As the other guys mentioned the fast flashing is caused by high resistance somewhere in the circuit. Find that & the problem goes away.
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Old 10-24-2008, 07:39 AM
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That happed on my 02 jeep wrangler and I had water in the turn signal which blew the bulb. Replace the bulb and sealed the lense, worked normal.
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Old 10-24-2008, 07:39 AM
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