Topper -
You've got the right attitude!
I can't see the caulk that you spoke of in the pictures, so I'm not sure what's going on there. From the pictures, it looks like you got a deal! I incuded them so the other members who are following this story can see it too.
First - Before lowering the top, check to be sure everything is clear and positioned inside the camper as described per the manual. Locate the lift controls, just inside the door, near the floor, on the left, usually behind a little flip up door. Review the control operation in the manual. Raise the top until the pump squeals, pull and hold the safety cable, lower the top.
Second - If the top won't raise check to see if the battery is charged. If not, either replace the battery, or use jumper cables. Then try the first step again.
Third- If it still won't work, locate the breaker described in the post that we gave you a link to (earlier in this thread), reset if possible or replace if need be. You can test the breaker with a volt meter to see if it's good or bad, it should show battery voltage between the battery ground and each terminal of the breaker. If you need to replace it, it’s a 12 volt, 30 amp breaker. Then try step one again.
Fourth - If there is still no power, Sam Shields said that some older models have an inline fuse, he said you could find it by tracing the wires. There are also a couple of fuses on the lift controls located just behind them. At least on mine anyhow. Test and replace as necessary and try step one again.
Since your DH rebuilt that truck, I know he's got to know his way around a volt meter, and with that and the manual he can track down the fault here, if there is one.
The folks in the Hi-Lo community believe in helping each other out, so if you can get a connection, while hubby is testing you can be a type'n.
If anyone else has suggestions for Topper, please jump in!
Neal