I just got a 1991 Trooper and when trying to use the right or left turn signal all of them (front right and left , rear right and left) flashes like the emergency lights. I already took it to a garage and the flasher and wiring seems to be OK, apparently the problem is the turn signal combination switch. Does somebody knows what is this Part Number and what other Trooper model (88', 89', etc.) would fit my 1991 for the same part?

Thanks.