Should be on the firewall.
you have to remove the panle on the outside of the jeep between the hood and the windshield. 4 screws.
The governor for the wipers is located near the fuse box. It is wired to the harness going to the wiper switch.
to the left of the wiper motor, a vacum hose and electrical connections are attacted to it
well if it has 4 cylinders it is a 2.4, if it has 6 it is a 4.0
It should be located inside the engine compartment mouted toward the top of the fire wall
Underneath the wiper motor assy.
The Ford Explorer was produced from the years 1990 to present. The wiper motor pulse board module in a 1998 Ford Explorer 4.0 L is located on the firewall, behind the engine in the middle.
If you need a wiper motor auto zone or advance auto parts should carry this.
If the windshield wipers are not working on a 1990 Chevy Lumina, the problem could be with the wiper motor, the wiper motor relay, or a fuse. The least expensive fix to this problem will be replacing the fuse if it is blown.
Check fuse then check wiper motor
Inside the fuel tank
On a 1990 Jeep Wrangler, the IAT sensor is located on the intake manifold. It is a gray, two-wire system situated on the front of the manifold.