Fuse 4 5amp keeps blowing

[trabolgan]

Hello all and thanks for reading my post. We have an audi A3 8p bkd 2005 with an electrical fault that's driving me and my Son crazy. We've read forums and done the following 

Fault occurred during an MOT test when the Oil level sensor light come on and econ light won't go off so no cool air.

We changed oil level sensor and G65 still fault.

Chase time: Removed G65 mating connector, removed oil level sensor connector

Turned off ac unit No4 fuse still blows, next is remove connector from ac compressor and check fuse. My only other thought is trapped wire harness but where, what do MOT tester look at.. my head is frazzled. We have also checked ac coolant gas level and it's full.

Any help would be very welcome. Thank you for reading.

 

[cliffcoggin]

If you are implying the fault was caused by the MOT tester, take it back and complain. If not, then extensive testing with a meter by yourself or an auto electrician is needed to find the short circuit.