Bad flasher unit, bad relay, bad wiring... any of those.
The current value for a 1989 Mazda truck in good working condition is $1,599.
You left some wires unplugged.
Check the radio/Acc fuse...
first place to look is the fuse next you might have a wiring issue in the tali end of the truck if you have trailer wiring tied into the stock wiring look there for broken wires or remove the "T" (if so equipped) and reconnect the stock harness
the cruise control is broken....
Check the bulbs, the fuse and the brake light switch.
Probably because the circuit board for the bulbs is rusted out at the bottom
i am trying to find out my my back lights are not all working
Under the dash, below and slightly to the left of the cigarette lighter. You'll have to remove dash panels to get to it.
Be sure that the dash light dimmer control is not turned off and check the fuses.
Is there a penny stuck in the lighter port?
If fuse is ok, could be a bad headlight switch