1987 420SEL Turn signals not working
 

My emergency flashers are working fine, which rules out the flasher button and the flasher relay. I plugged in a known good combo switch(turn signal lever) with no luck; however I did not actually install it, just plugged it in; could this have somthing to do with it? I also noticed that turn signals, nor hazzards worked with the insturment cluster removed, so I tried a different cluster, thinking that could be the culprit, with no luck. What else could it be?

Possibly the hazard switch...try switching it ON/OFF several times with some heavy finger force.