Was at the lake all weekend with my truck('88 C-1500) and yesterday when we were getting ready to go load the boat, I noticed the emergency brake light was on. I went to release the e-brake but it was not on. When the e-brake is on, the light is slightly brighter, but even when released the light stays on at about 50-75% brightness. I thought maybe it was trying to tell me I was low on brake fluid but I checked it and it was still at the full mark. So does anyone have any idea what would make this light stay on all the time??? I'm at a total loss here. 