Still having problems with my 2002 zr2 blazer. its a 4.3 auto. it cranks but wont turn over and i cant hear the fuel pump prime, so i put a new fuel pump in and still have the same problem. I put the power probe on the relay and it popped the breaker in the test light, what does that mean. My uncles the mechanic and he says u have a short somewhere. Any ideas would be great its my daily driver.