Joe 97RA

The headlights motors on my 87 work. If the lights are manually raised, they will go down when the lights are turned off. When turned on, there is no power to the motor. I can manually jump the motor and it works both up and down flawlessly. Where is the relay that inverts the polarity to raise and lower the headlights located? Is it on the passenger side up behind the headlight? Anyone have at least a part number?