Hyundai 95550-39000 Flasher Module-Turn Signal

The turn signal/hazard flasher, which is a black plastic canister probably about 3 and a half inches high attached to the wiring harness under the dashboard, is for flashlighting the turn signals. In addition to this, it should be noted that when working without any complications, it is possible to hear a clicking sound. When the turn signals of one side go off and the flasher unit does not make the famous clicking sound, that implies a bad turn signal bulb. If both turn signals fail to function and blink, then it is caused by a bad output flasher, bad switch, bad fusible link, or an open or shorted turn signal switch. It is possible for the turn signal fuse to have gone off and this may be discovered just by a look at the fuse box and before replacing the fuse, one should check the wiring whether it has a short circuit. On the models of the year 2005 and earlier, the turn signal/hazard flasher is situated on the interior fuse and relay box place that is situated under the left end of the dash which means the kick panel has to be removed.

In its normal condition, a clicking sound is heard when a turn signal and hazard flasher is operating. If on one side of the automobile only the turn signals do not flash, or if the flasher unit and does not make the usual clicking noise, or if a bulb on one side is much quicker in flashing while the bulb of the same side does not light at all, then it would be indicative of a faulty turn signal bulb. If both of the turn signals do not blink, chances are that you have a blown fuse as well as a faulty flasher unit, the switch is likely to be bad, or perhaps there is either a loose or an open connection. A simple visit to the fuse board can help identify a 'blown turn signal fuse' sometimes it is recommended that one checks the wiring for shorts before replacing the fuse. The turn signal and hazard flasher is usually located at the back of the knee bolster on most models, near the instrument panel junction block. To reach this, pull the handle of the fuse and relay center access door located below the knee bolster at the driver's side, or simply release the knee bolster. Near to the Instrument panel fuse/relay block, you need to search for the turn signal and hazard flasher, you have to unplug the electrical connector of the flasher unit and then take the flasher unit out of the junction block. Replace the unit with a similar one, though it is recommended that you compare the new unit by holding it with the old one before installation, which is the reverse of the pulling process.

When the turn signal and hazard flasher is functioning properly, a clicking sound is audible during operation. If the turn signals fail on one side and the flasher unit does not produce its characteristic clicking sound, or if a bulb on one side flashes much faster than normal while the corresponding bulb on the same side does not light, a turn signal bulb is likely faulty. If both turn signals do not blink, the issue may be a blown fuse, a faulty flasher unit, a defective switch, or a loose or open connection. A quick check of the fuse box can reveal a blown turn signal fuse, and it is advisable to inspect the wiring for a short before replacing the fuse. For 2005 and earlier models, the turn signal and hazard flasher are found in the instrument panel relay box; removal involves taking out the hazard relay or flasher unit, ensuring the replacement unit matches the original, and reinstalling it in reverse order. In 2006 through 2010 models, the relay is located under the left side of the instrument panel above the junction box, and it can be pulled straight out, possibly requiring the release of a plastic tang. Again, the replacement must be identical to the original, and installation follows the reverse of removal. For models from 2010 and later, the hazard flasher/relay is integrated into the instrument panel control module located under the driver side of the instrument panel.

Turn signal and hazard flashers are incorporated in an electronic flasher unit installed in or near the passenger comartment fuse block and can be located by listening for the clicking when the signals are on. If the flasher unit from the previous operation is healthy, it should create a sound of click during the operation, and if all the turn signal bulbs are flashing in one direction only then it should be considered as a bad turn signal bulb. If both turn signals do not blink, then there could be a problem with the turn signal fuse, the turn signal flasher, the switch or loose or open wiring; checking the fuse box can reveal a turned off turn signal fuse, as for wiring it should be checked for shorting before replacing it. On the year 2006 and models older than that, it is fairly easy to replace the flasher and to do this, one just has to un-clip it from the relay terminal which is situated above the fuses near the drivers' side of the bulkhead, the replacement should however have to be in a similar model as that of the previous unit and the process of installation is done in the reverse order to the removal process. A bulb check for the models made between 2007 and 2010 is done by pulling the wiring connector off the flasher, and then removing the mounting screw you will find is easy to perform, installation also follows the same process of removal. For the 2011 and later models, a Smart Junction Box (SJB) is deployed and manages other circuits like turn signals, and hazard; if the overall circuitry is a problem, replace the exterior light bulbs and switches, and if no reliefs are gotten, then check and read the SJB with a scan tool. To remove the SJB; first, remove the knee bolster, remove ground by removing the negative battery terminal, then detach the electrical connectors, and finally remove the SJB mounting nuts/bolts, and electrical connectors lastly, to install, reverse the process.

Most relays are marked to help determine which terminals are the control circuit and which are the power circuit.

If the relay does not click, try swapping the jumper wires on the control circuit terminals, as polarity may be critical for some relays.

Relays transmit electrical signals to components such as the fuel injection system, horns, starter, and fog lamps using a low-current control circuit to open and close a high-current power circuit.

If the relay fails the test, it should be replaced.