GT headlight doors

My 70 GT was damaged in a parking lot incident. The front clip was removed, damage repaired and repainted with new stripes installed. A test drive revealed the headlight doors wouldn't operate. And I could hear what sounded like a relay clicking every few seconds. I returned the car to the shop for that reason and a couple other minor electrical issues. After a week, they still cannot get the headlight doors to operate consistently. Any ideas on what the issue is and how to solve it?