Fuse 57 in engine bay keeps blowing

[fouad]

Hi
The fuse number 57 in the engine bay keeps popping once i replace it also OBD is giving these codes
I have recently had an engine rebuild so the wiring harness has been taken off and reinstalled
Any one with similar experience?
Thanks

 

[harrye500]

Possibly a silly question on my part, but can you confirm if its the right fuse? Same happened to me - the fuse for the lighter socket that I was using with the tyre-pumper-upper kept blowing. Wrong fuse (too low) was fitted. Replaced with the right one and all good since. It is worth a check.

 

[fouad]

It was a 15A. Replaced it with 20A and it popped then with 25A and it still popped so I did not want to up the amp more to avoid causing more damage. Going to a specialist next friday and will post updates then

 

[harrye500]

Worth a try. Could be a short if you've worked on the harness - a good specialist should hopefully be able to trace though with the right kit.

 

[fouad]

Actually I have replaced the whole harness with one from a donor car

 

[supernoodle]

Well if you're saying the issue is there with 2 different harnesses, guess it's not harness.
You need to identify everything on the circuit and disconnect them. New fuse in and power on fuse shouldn't blow, if it does it is harness.
Reconnect everything one at a time until fuse blows.

 

[fouad]

Update:
It was the O2 sensor. The wires behind the sensor were deattached from it and were touching each other. Replaced O2 sensor with a new one. Car is now running 10/10.

 

[harrye500]

Well done. Those pesky O2 sensors!