Left Front Turn Signal HELP

[RRcrazy]

1970 Roadrunner just put in a new Dash Harness., now left front turn signal won't light? They all work when you put on the hazards,also when the running and headlights are on but won't light up when you turn the left signal on. The rear lights on the left do blink. Also the dash indicator light isnt lighting either but will light when hazards are on. recap:
-everything works normally except left front turn signal and left dash indicator light.
-they do blink when hazards are on
-left rear does blink even though the front and dash don't

Any help appreciated., :confused3:

 

[red 69 runner]

replace the turn signal switch

 

[WileE]

Whoa... before you replace anything... check your grounds and your bulbs. Are your tail light housings grounded ? Do you have the correct harness ? Are the connections hooked up properly ? If everything worked before, there is no reason why it shouldn't now.

 

[RRcrazy]

I checked the bulbs and grounds everything looks good. With the Hazard on all 4 lights and the insturment cluster work...... if the grounds and bulbs were bad that wouldnt happen right?. The only thing that doesnt work is when I put on the left turn signal swith on then the front left and left indicator on the dash do not work. You can hear the relay working in the car and the rear left does work but not the front??????