TURN SIGNAL MALFUNCTION,

1989 Ford F-150

Tiny

tenn1987

November, 1, 2013 AT 11:42 PM

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?

11 Answers

Tiny

cadieman

November, 2, 2013 AT 5:31 AM

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

Tiny

cadieman

November, 2, 2013 AT 5:31 AM

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

Tiny

cadieman

November, 2, 2013 AT 5:33 AM

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

Tiny

tenn1987

November, 2, 2013 AT 10:52 AM

I tried this today and it made no difference.

Tiny

tenn1987

November, 2, 2013 AT 10:59 AM

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

Tiny

tenn1987

November, 2, 2013 AT 11:14 AM

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

Tiny

cadieman

November, 3, 2013 AT 1:14 AM

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.

Tiny

tenn1987

November, 3, 2013 AT 8:54 AM

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

Tiny

tenn1987

November, 3, 2013 AT 8:06 PM

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

Tiny

cadieman

November, 4, 2013 AT 6:40 PM

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

Please login or register to post a reply.

Replace Your Turn Signal Switch Like a Pro