I just installed my guages on my 1990 honda accord and They are not functioning quite right. Sometimes when I turn the car over they do not turn on and other times they do but i cannot adjust the intinsity. But whenever i just turn on the electrical system without starting the car they work fine. wierd?

I tried wireing the guages into a few adjacent power sources with no luck so i just spliced the power going to my stereo and they worked. Should I re-wire them back to the fuse box or something?

Thanks for any help you could offer.