Strange things...

I finally got my GSR all back together, only to find the ECU fuse blew every time I turn the key to start the car.

Several hours with the wiring diagrams in the service manual and my trusty multimeter, and I found the culprit - ALL FOUR leads on the primary O2 sensor were shorted directly to ground! I have no idea how this happened, it must have been some trauma that I put the sensor through when I was removing it previously, but it was weird. Dead short, as soon as the main relay powered up, the fuse would go.

Anyway, I was just curious if anyone else has ever seen an O2 sensor completely short out to ground like this?

 

never seen that, and I hope I never do. finding that must have been as much fun as a trip to a sadistic dentist

 

after just putting in a new exhaust, i didnt put the o2 harness all the way back in and it started to melt. maybe yours melted all the way through and is touching the chasis?