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Jeep Wrangler JK Turn Signal Light

Diagnosing Common Jeep Wrangler (JK) Turn Signal Lights Problems

Though they rarely cause problems, the turn signal lights of the Jeep Wrangler (JK) are not invulnerable to failure. And once they do succumb to wear, damage, or factory defects, broken Jeep Wrangler (JK) turn signal lights will not only become an inconvenience but also a safety hazard due to your vehicle's decreased visibility on the road. In this guide, we'll teach you how to diagnose common problems with Jeep Wrangler (JK) turn signal lights.

The lights refuse to blink.

If one the Wrangler's turn signal lights don't blink, the first thing you should check is the turn signal indicator on the dashboard. If the indicator light stays on but doesn't flash, the problem is likely to be a faulty turn signal flasher and needs to be replaced. But if the indicator light stays up and flashes at a normal rate, check the front and rear turn signal lights to see if all the bulbs are working. If one or more of the lights are flashing in either direction, it's likely that one of the bulbs have burnt out.

The lights don't activate.

On the other hand, if all of the turn signal lights do not illuminate, the problem could either be due to a faulty wiring or a shorted fuse. First check the electrical connections and see if they are not cut or damaged in any way. If the wiring appears to be in good condition, check the fuses in the fuse block. If the metal strip inside one the fuses are broken, it means that the fuse has shorted out and needs replacing. However, if all the fuses also appear to be working perfectly, the fault could be with the turn signal switch.

Lights are blinking faster than normal.

There have also been cases wherein the turn signal lights blink faster than normal. This problem is typically caused by either a malfunctioning bulb or a broken or grounded combination switch. If the bulb fails to work properly, the resistance switches adapt to the sudden change by making the light blink repeatedly. But if the bulb appears normal, the combination switch may have worn out and is supplying inadequate voltage or it has become grounded due to excessive dirt and requires cleaning.

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  • How to Care for and Maintain Jeep Wrangler (JK) Turn Signal Lights 27 February 2013

    The turn signal lights are usually not the first things Jeep Wrangler (JK) owners have in mind when it comes to maintenance, but caring for and maintaining these devices properly can help to significantly extend their service life and reduce their likelihood of breaking down. Like all components of the Jeep Wrangler, the turn signal lights are vulnerable to wear, particularly if the vehicle is frequently exposed to high temperatures and humidity (which outdoor vehicles such as the Wrangler are typically used in). The following are some simple maintenance tips you can use on the Jeep Wrangler (JK) turn signal lights:


    Clean and inspect the turn signal lights regularly.

    Dirt, mud and other road debris can stick on the turn signal light lens and erode the lens surface, so clean them as often as possible. Even mild, soapy water is good enough to clean the turn signal lights, although we recommend using a non-abrasive sponge or lint-free cloth to avoid scratching the lens. Also, when cleaning the lights take the opportunity to look for cracks and other signs of damage on the lens surface. Minor cracks and scratches can usually be buffed out, although more serious damage to the lens may require replacement.


    Remove excess condensation inside the light housing as soon as possible.

    There are cases wherein droplets of water may form on the inside of the turn signal light lens. This is caused by condensation from the varying temperatures inside and outside the turn signal light Housing, and usually evaporates through the various openings around the lens. However, excess humidity or clogged openings may cause larger pools of water to accumulate at the bottom of the housing. This must be removed as soon possible to prevent rust from forming and the bulb from shorting out. To do this, take apart the turn signal light assembly and pour or wipe out the condensation with a soft cloth. Also, check for clogs on the openings around the turn signal light housing and remove them if necessary.


    Avoid parking for long periods in the sun.

    The plastic lens of the turn signal light housing will start to deteriorate if exposed to the sun's UV rays for too long, so try to park it under a shaded area. If parking under the sun for prolonged periods is unavoidable, cover the vehicle in UV-resistant cover.