1990 300te power seats lumbar not functioning
 

I have an 1990 300 te with full power seats, one day i was adjusting the seats (lumbar supports) and they stopped working , although not a critical function, one that i was glad to have .
I am wondering if any of you boys know of a few quick checks or can guide me on where to find any relays or locations to look for.
Hopefully it is a repairable funtion, not willing to sink$$ into minor details, i have a manual, and will be looking into the repair soon . waiting for milder weather.