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1998 Mercury Grand Marquis Question: why is my turn signal flasher irratic?

 

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louieg83, Sanford, FL, August 01, 2014, 12:50
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When I turn on my turn signals(either way), the flasher flashes irattically.Sometimes it's ok and then it will become irratic. Is this a problem with the control or the flasher?

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  • Answer #1

    August 01, 2014, 15:13
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    . .

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  • Answer #2

    August 06, 2014, 07:33
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    As you will notice there is no separate turn signal flasher for this year. The flasher is built in to the lighting controller. I had the exact same problem with my 1998 Grand Marquis LS.

    The lights are flashing fast because of the current draw on the wire run. I bet if you turn off the blower on your AC (turn off controls) you will notice that the lights flash at normal pace again. As the blower motor goes faster (higher fan speed) the light flash fast too.

    2 Solutions:
    1) CHEAP - Ignore it or turn down the blower motor speed when using turn signal
    2) Follow Ford Service Bulletin for this problem which tells the tech to rewire the flasher circuit to not share a common draw which looked like a pain in the butt but it will solve the problem.

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    louieg83, August 19, 2014, 08:06
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    What happens if I completely disregard the irratic flashing and just let it do what it must? Will this lead to a worsening problem? It seems to bother me mentally but it doesn't seem to be getting any worse.

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    electronicbuff, August 19, 2014, 17:48
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    There will be no damage as a result of the fast flash. Just annoying. Do verify though that all of the lights are working though so you know it is not a legitimate signal of a burnt out bulb.

    The flash rate should be normal if the fan blower is off.

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