1989 FORD F-150 TURN SIGNAL MALFUNCTION,

  • Tiny
  • tenn1987
  • 1989 Ford F-150
  • 179,000 miles

I am having an issue that is puzzling, My '89 F150's front right & left rear work when I attempt to us those, however the front left & right rear do not. What puzzles me is that the hazard, when engaged cause all 4 to flash. I flipped the hazard and turn signal fuses and nothing changed, so what gives?

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Friday, November 1st, 2013 AT 11:42 PM

9 Replies

  • Tiny
  • cadieman
  • Member

As each bulb has two filaments one is obviously blown in each bulb. U will need to replace them. Buy 2 1157 bulbs

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Saturday, November 2nd, 2013 AT 5:31 AM
  • Tiny
  • tenn1987
  • Member

I tried this today and it made no difference.

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Saturday, November 2nd, 2013 AT 10:52 AM
  • Tiny
  • tenn1987
  • Member

In fairness I believe the last owner altered the fittings as they now accept 3157.

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Saturday, November 2nd, 2013 AT 10:59 AM
  • Tiny
  • tenn1987
  • Member

Additionally, the left/right switch does not lock in position

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Saturday, November 2nd, 2013 AT 11:14 AM
  • Tiny
  • cadieman
  • Member

3157 is just a newer style bulb. You need to buy a test light. Check to see if your getting voltage at the sockets when the lever is pushed up or down. You will also need to replace the turn signal switch. But let's get the lights working now.

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Sunday, November 3rd, 2013 AT 1:14 AM
  • Tiny
  • tenn1987
  • Member

If the socket fails the voltage tests what shall we do? I'll be testing it soon.

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Sunday, November 3rd, 2013 AT 8:54 AM
  • Tiny
  • tenn1987
  • Member

They did, I'm tracing the wiring, almost have the rear located, as for the front. Not so easy.

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Sunday, November 3rd, 2013 AT 8:06 PM
  • Tiny
  • cadieman
  • Member

So you're not receiving a voltage signal to the wires right behind the socket?

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Monday, November 4th, 2013 AT 6:40 PM
  • Tiny
  • tenn1987
  • Member

I've received input for parking and hazard lights but not turn, the black wire is receiving an overload error on multi-meter.

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Monday, November 4th, 2013 AT 9:36 PM

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