Originally Posted by billschroeder5842 (Post 1596662894)

Start with double checking your grounds. Sounds like yu may have an open loop somewhere in your system on the left. There is a ground strap on the rear frame rail just being the antnae. They corode after time as they are directly in the path of rear tire spray.

Originally Posted by billschroeder5842 (Post 1596666110)

Certainly.... anything is possible when wiring starts to get done and redone. Double check your connections and then check the ground.

Originally Posted by i987c0sw0rth (Post 1596672543)

Looking at the wiring diagram in the Haynes manual,it looks as though there are 2 connections on the indicator flasher unit, and by my thinking, if either were not connected, either the external indicators or the right turn arrow in the dash would not work. I am thinking your bad earth diagnosis could be spot on. Can you please tell me where the earth bolt is located on the rear of the chassis. We are expecting snow for the next week or so but I will get onto this when it has cleared . Thanks for your help.

Originally Posted by ihatebarkingdogs (Post 1596676586)

There is only one flasher for both sides. If one side works correctly, the flasher is not the problem with the other side.
The indicators in the cluster are connected to the same wire as the front signals. Same colors too. Lt blue and Dk blue. (I don't recall which color is which side, look at the wires at the front signal bulb holder). If the front signals illuminate, there is power on that wire to the cluster indicators as well. If the below checks are all affirmative, then you may have a bad connection at the cluster connector, or on the board itself.

The indicators can get messed up by bad grounds at the front of the car ESPECIALLY with the park lights on. Do all your checking with the park lights on.USUALLY, ground problems result in the cluster indicator being ON when it shouldn't be.

Another clue as to "bad ground" or connection at the bulb is to watch the side marker light on the same side. With parking lights = off, the side marker should flash WITH the front. With park lights = on, side marker should flash opposite the front.

Verify the signals on the front of the car work correctly, including with the park lights on. If = yes, go back to the cluster and check the Lt blue and Dk blue wires going into the connector for 12V. If you use the hazards for this test, you don't need to know which color is which side. Both wires should "flash" with the flashers.