I have a 86 F150 with hazard and turnsignal problems. When I use the flashers only the right front works, on the turnsignal side nothing works. I have power coming into the signal switch but when I turn the signals on I have nothing going out, not for sure this is the switch or not I had a fire up under the hood and replaced everything, the signals worked fine for a month or so. Is there a way to test the switch or byepass the switch to see if the problem is grounds or something else any help would be great!.

Thanks
Tim