Hey guys, whats the best way to test the electrical system on my 94k1500. I have been noticing that when I have all my accessories on (defroster-full blast, headlights, and radio) my amps gauge is close to 9 when it should run around 14. When I brake or use my blinkers, its goes even lower. I have a brand new battery (3 months) and my alternator test positive. Any suggestions? Also, I dont know if this is electrical related, but my horn sounds weak. Its a very low pitch sound. When I honk the horn, its drops my amps as well.