Hi, I did the brakes on my sled 1.5 years ago and the truck has been off the road for a year now. The only thing I didn't change was the booster. I ran the truck back and forth in the yard to clean the rust off the drums. When i was doing this the brake light flickered for a few minutes then came on fully. I checked the parking brake to make sure it was hitting the switch. I cracked the lines under the distribution block and pumped it a few times just to make sure the switch in the block was getting pressure. The master cylinder will bleed down slowly but it takes good pressure to do it. Any ideas??