1998 Ford F150 Turn signals will not blink or emergency flashers

Bad power or ground. Here's some pics.

you need to replace the turn signal flasher. it looks the same as the emergency flasher but only operates when the signals are needed.

I doubt it is the flasher since it handles both sides. A more likely cause is a faulty bulb socket or wiring problem.

there are three of them(assuming coolant fan) and they are located in the under hood electrical center. Left(dr) front corner of engine compartment.

check the fuse first!! then check the flasher relay located in the fuse box under driverside of dash

surely this didn't just happen one day. did you mess with the wiring harness or have someone mess with it . you can also check the fuses under the hood . you have some major stuff happening there. good luck

The turn signal flasher assembly is located under the driver's side of the instrument panel, on the front of the fuse panel, or under the center section of the instrument panel in the relay/flasher block. This is ,basically, the controller for your turn signals.

Click here to view a picture of the flasher switch.

Sounds like a multifunction switch, work the emergency flasher button up and down a few times, then attempt to work the turn signals if the signals work then you will need a multifunction switch.

There are 2 flashers. They both are the same. Turn on the emergancy flashers, you can feel it 'pults', then look for the other. Should be close by! Frankster016

Hi,

If I understand you right based on your post/description, the signal lights would still turn on even if any or both of the flasher relays are removed. Should this be the case, then the signal lights are not getting the power from the flasher relays but from the brake light circuit.

Perhaps your concern is not with any of the flasher, but simply missing or loose ground more particularly with the rear lights. Perhaps you could try determining which of the wires for the brake lights and signal lights (as they come out of the light assembly) would be ground . A test and even possibly a temporary workaround is to hard wire a second ground connection from the determined ground wire of the lights and attach it to any conveniently located bolt or screw to the body. it may be to your advantage to do this on all the rear lights assembly.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.