Turn signal and hazard flasher — check and replacement Ford F150

Warning: The models covered by this manual are equipped with a Supplemental Restraint System (SRS), more commonly known as airbags. Always disconnect the negative battery cable(s) and wait two minutes before working in the vicinity of any airbag system component to avoid the possibility of accidental deployment of the airbag, which could cause personal injury (see Airbag system – general information) .

1. The turn signal and hazard flashers are an integral part of the BCM (Body Control Module) and are not serviced separately. If the BCM has been determined as the fault, the unit will need to be replaced and programmed to the vehicle. See a qualified independent repair facility or dealer repair department for replacement and programming.

2. When the flasher unit is functioning properly, an audible click can be heard during its operation. If the turn signal indicator (on the instrument panel) on one side of the vehicle flashes much more rapidly than normal, a faulty turn signal bulb is usually indicated.

3. If both turn signals fail to blink, the problem may be due to a blown fuse, a faulty flasher unit, a broken switch, a loose or open connection or a faulty Body Control Module. If a quick check of the fuse box indicates that the turn signal fuse has blown, check the wiring for a short before installing a new fuse.

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