First check the TURN fuse. With key on check each signal left and right. One side not blinking could be a bad bulb. Check the 4 way flasher, this should light all blinking bulbs and also operates on a separate flasher, if everything works here then you may have a bad signal flasher (under dash near fuse panel) if all bulbs work. 4 way flasher is usually plugged into fuse block.
1985
The ground wire on a typical Chevrolet truck should be located at the rear of the vehicle. The wire should be white in color, and should be attached to the frame by a screw. You may need to remove the tail light housing and trace the wire from there as the location varies on different models and years.
On the left side of the Steering Wheel
clockwise
you spelled mack wrong...its mac
The ground wire going from the cab of the truck to frame and/or the ground wire going from the back of the motor to cab ground. The reason is that the ground wires lay across the exhaust manifold and get burnt off after a years of use.
You turn it counter clockwise!
the bass button on radio
front or rear turn signals
The turn signals are not fused front and/or rear. If the rear are not working you need to check for power and grounds for the lights.
Flasher is faulty.
yes