Yes, do what others have suggested. Here's something I ran into when we purchased our new to us '04 Itasca Horizon 36GD a couple of months ago. The passenger side mirror would move left and right but not up and down. Kind-a-like your spot light. Now, unlike your spot light, I can actually interchange mirrors to do some testing to eliminate certain prospects of a the problem.
Well, long story short, after messing around with it for quite a while, I simply MANUALLY moved the mirror up and down a zillion times by hand. Then, hooked everything up and vualllllla, it worked and has ever since. What we figured was, the previous owner, never moved the mirrors 'cause he was the only driver. So, thinking that, that was most likely the answer, I move the mirrors full swing, left to right, up and down every chance I get to keep them active in their travel.
Now, would this MANUAL movement of your spot light work too, who knows? It might be worth a try but, by all means, don't force anything that seems to be locked up.
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)