if it worked fine before you took out your dash then it could be anything from a loose or missing ground, to a internally fractured wire.

1st thing i would do is replace all related fuese with new ones EVEN IF THEY LOOK GOOD.
2ndly replace or repair actual switch.


i had an issue where i had to play with my headlight switch to make the park lights stay on but my headlights would always come on. i took apart my headlight switch and cleaned all the contacts and put some fresh grease in there.

i also did a local friends 90 cb7 earlier that week because his headlights wouldnt come on at all. his headlight switch was melted internally so we replaced it.

 

I know exactly the issue your referring to..!! I have to have it just barely flip mu headlight switch on to have my taillights come on.
If the headlight switch was my issue would the relays still click as they do?

 

I have the same issue, however they turn of and on fine. When im driving if i hit a big bump or even shut my door they will lower. Lights stay on they just flip down and wont flip back up. This might be an easy fix. But i am no mechanic or technician. Seriously debating buying the cars for dummies book.

 

Yeah i manually cranked them up, drove then parked. Later that night I go to my car and they cranked down on their own. Annoying. I know a good few about cars, but this issue has me stumped.
I am really confused why a dimmer relay clicks when I try to flip them up...