2000 Jeep Grand Cherokee, Turn Signals Erratic / Not Working

This 2000 Jeep Grand Cherokee came in with the complaint that the turns signals would work sometimes. When it arrived at the shop they were not working at all. Experience tells me that it is probably a faulty flasher assembly but a few panels have to be removed to access the flasher relay.

The panel at the lower edge of the instrument cluster unsnaps and pulls away. It has to be maneuvered around the tilt lever.


The fuse box cover at the lower left of the dash has to be removed. It unsnaps and pulls down.

There is a 10 mm headed screw in each of the lower corners of the knee bolster.

A phillip’s head screw at the end of the dash.

Two phillip’s headed screws at the top edge. One on either side of the steering column.

In the picture below, I am pointing out that there are relays above the fuse area.

The hazard/turn signal flasher relay. With either the hazards or turns signals switched on it usually only takes a slight push to make the flasher start working again. After I was sure of the problem, I used a pair of pliers to gently grab the relay and wiggle it from its socket.

I then used a couple of small screw drivers to release the side latches that hold the cover on the relay assembly.

With the latches released I separated the two pieces.

If you look closely at the upper left solder joint you should see the crack in the solder joint.

A little touch up with a soldering gun and some electronics grade solder and this one was fixed.

Sometimes more that one solder joint will have to be repaired so look closely.

51 discussions on “2000 Jeep Grand Cherokee, Turn Signals Erratic / Not Working”

  1. Wow, I have the exact problem with my 2002 Grand Cherokee Laredo that Anonymous has, left turn signal flashes very quickly in front and doesn’t work at all in the back. I replaced the relay and still have the same problem. I will try replacing the rear light assembly.

  2. More than likely the circuit board in the rear light assembly is faulty. Over time the black plastic is heated and melts away from the metal tabs. With no support the metal tab flex away from the contacts on the gray bulb sockets. The best fix is a new light assembly, new socket and new bulbs. I have heated and reformed the plastic so that it will support the metal tabs. It only works about 50% of the time though.

  3. Thank you for your quick response! The left turn signal flashes extremely fast in front and not at all in the back. It used to only happen periodically, but is constant now. At first, the entire tail light wouldn’t work when the front flashed very fast, but I finally got the brake light to work. The turn signal worked for two blinks earlier today so I know the bulbs are good.

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