on my 98 c/c dak my headlights are dim, running at about 25% brightness. The high beams work great, but won't stay on, i think its a switch problem. But the normal headlights don't shine at all and i can barely see anything on the highway. This is bad becauase i drive 100km or more a day on the highway in the dark. I dont think its a fuse, or a ground, because with those its all or nothing, no dimming. Should i replace the bulbs, or just run brighter bulbs?