Help! No start!

[JW]

Plenty of battery power but won't crank. Acting as though the PCM is hosed. No temp gauge (engine is hot), no message center (all dashes).

 

[JW]

Fuse #41 (HEGO VMV CMS PTEC) keeps blowing.

 

[apanello]

Find the short! Follow the wire behind the fuse box. Wow this has me kinda at a loss for ideas...

 

[JW]

My limited research says it's a shorted O2 sensor harness. Dig into it tomorrow.

 

[JW]

OK, disconnected both of the heated (front) sensors and truck started right up. It idles funny, but I'd expect that, with no O2 readings. I don't see any damage to either the sensor pigtails or the engine harness side. I suspect I may have at least temporarily cooked one of the O2 sensors, as I had just finished towing one of our band trailers and it was very hot under the hood (but coolant temp was normal). I'm waiting for it to cool so I can hook the sensors up one at a time and test again.