Jeep Cherokee Forum

Jeep Cherokee 1984-2001: Why are My Headlights Flickering?

Issues with lighting on your Jeep XJ are unsafe and could cause an accident, especially the headlights. Although the main issue could be simple to fix, some diagnosing is required.

By Jerry Perez - August 28, 2015

This article applies to the Jeep Grand Cherokee XJ (1984-2001).

Few things are more dangerous than not being able to see where you are going. Flickering headlights not only are representative of an electrical issue with your Jeep, but not taking care of them in a promptly manner is unsafe and could lead to an accident. Flickering headlights could be caused by multiple things, and while most are rather simple fixes, there are others that could take a little more time and effort to diagnose and repair. We've compiled a guide with the most common reasons for headlight flickering, but if troubleshooting isn't your forte, then you may want to visit your local dealer or repair shop.

Materials Needed

  • Needle nosed pliers
  • Phillips and flat head screwdriver
  • Shop rag or tower
  • Replacement fuses (optional)
  • Replacement wiring harnesses (optional)
  • Replacement headlight switch (optional)
  • Voltmeter (optional)

Step 1 – Check fuses

They may be burnt.

Fuses are in charge of delivering stable electrical power to multiple components in your Jeep, one of those components being the headlights. If a fuse is damaged or burnt, it will cause the headlights to work intermittently or not work at all. Follow these steps to check your fuses:

  • Access the fuse panel located to the left of the driver's footwell.
  • Use the needle nosed pliers to remove fuse numbers - 3.4.5 and 19.
  • Inspect the fuse condition.
  • Replace fuses if needed.

(Related Article: Fuse Box Diagram - CherokeeForum.com)

Figure 1. Inspect fuses.

Step 2 – Check wiring

It could be frayed.

Without wiring, nothing would get the power needed to operate. So if the wiring, wiring connectors and even ground wire are faulty or damaged, it will most definitely make your headlights flicker. It is important to analyze the condition of the wiring throughout the entire system in order to diagnose the problem. Follow these steps to troubleshoot:

  • Open hood and locate the wiring connector in the back of the headlights.
  • Inspect that the wiring harnesses are plugged in firmly and aren't corroded, etc.
  • Check that ground wire is firmly attached to its source.
  • Replace wiring or wiring harnesses if frayed or damaged.
Figure 2. Frayed wiring harness.

Step 3 – Check headlight switch

It could be faulty.

The headlight switch is the only user-operated component in the entire headlight electrical system; therefore, it's subject to wear and tear from daily use. The backside of the headlight switch is made up of a prong-like connector attached to a wiring harness. Sometimes, the switch, connector and harness can become dirty, worn out or simply fail. Follow these steps to diagnose and possibly replace the headlight switch:

  • Remove the dash panel trim surrounding the headlight switch.
  • Use a Phillips or flat head screwdriver to remove the headlight switch panel.
  • Unplug switch and wiring harness.
  • Inspect switch and wiring for gunk, corrosion or burnt marks.
  • Use a voltmeter to make sure switch is receiving power. (You can normally borrow a voltmeter at your local auto parts store).
  • Replace parts if needed.
Figure 3. Back end of a headlight switch.

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