Re: 90 Ranger Blinkers dont work
Blinker/Flasher relay. Should be located on you fues panel. Mine is round on my '89.
To test I believe you can turn your lights on, have a friend watch you apply the brake pedal, then turn your blinker on all the while still pressing the brake. If It's the relay the brake light on the either right or left side depending upon which way you switch it will no longer work. Switch blinker the other way and the brake light on that side will go out.