The wiring harness in my truck has two flashers with two terminals each.my question is can I connect the blue wire to one flasher and the yellow wire to the other,or do I need to use a three terminal flasher? BTW switch is a 800 series with seven wires
the reason your truck has two flashers is because one is for turn signals and the other is for hazard lights. the wireing has to stay that way or you'll have your turn singals working with hazards and visa versa