So I am slowly working through the issues with the latest 03 I picked up, but this issue has me baffled. Right blinker works fine, left and hazards do not. When I try to use the left or hazards I get one blink pulse only on the dash, one click under the dash, and no lights exterior.

Changed so far:

Interior fuse box
Blinker stalk switch

Disconnecting taillights and headlights makes no difference.

Anyone ever seen this? I am beginning to suspect the ECU.

 

Inside the back hatch area of your Disco 2 on the passenger side is a plastic vented cover on the corner vertical pillar.

Pop it out and look inside.

I had a small electronics box in there that had a ground screw holding it on to the frame, except that it had come loose. I got really odd behavior from my taillights and brake lights until I found and screwed that ground screw back tightly onto that box.