I swapped out batteries in my Blazer (as seen below) and 1. The glow plugs took forever to warm up (2 mins) and the wait light still didn't go off! 2. When I tried to turn the lights on, the horn blew!? Has anybody ever experienced these kind of problems? If so what/how is the best way to fix them? This is my daily driver, so I need to fix it and fix it fast. Also would a pushbutton glowplug warmer and new glowplugs do the trick? New wiring also? If new wiring is required, could I do it myself?