V-6, 4.2, rear-wheel drive, automatic transmission.
When I tried to start my truck it turns over but will not start. It blows 30-amp pcm power fuse, location #15 in power distribution box. The fuse will not blow if I remove EEC power relay. I have disconnected the fuel pump fuse and relay and inertia switch, pcm connector at pcm; performed wiggle test in harness between power distribution box and pcm. None of these solved the problem.
What else can I try? What do you think the problem is? Can it be the O2 sensor preheat power relay? And, if so, where exactly is that located?
Thank you for any help you can give.