R56 2007 Mini Cooper AC compressor not getting power and radiator fan not turning on
#1
R56 2007 Mini Cooper AC compressor not getting power and radiator fan not turning on
I have used the search function and I cannot find the specific solution to my problems.
The AC compressor does not turn on.
The refrigerant is full (checked and correct pressure according to AC manifold set).
When the AC compressor is disconnected from the body harness and 12V applied from external power source, the compressor turns and AC blows cold inside.
When the AC switch button is pressed, the green light turns on at the button and the engine RPM increases, even with the compressor disconnected.
When the engine is not running, pressing the AC switch button immediately blows the 10A fuse with the compressor disconnected (FL23 in the passenger side interior fuse block).
When the 10A fuse is replaced with a 25A fuse and the AC switch button is pressed when the engine is not running, it does not blow with the compressor disconnected .
However, when the engine is running with the compressor disconnected, pressing the AC switch button immediately blows the 25A fuse (indicating a short).
With that said, the radiator cooling fan does not turn on, even if the coolant temperature is over 230 degrees.
The radiator fan does not turn on when the AC switch button is depressed with green light on.
External 12V power source to the radiator fan turns the fan on.
Jumper between pin 87 and 30 of the stage 1 fan relay turns the fan on. It is not the relay as I swapped 2 other known working neighboring relays from the under hood fuse block.
NO check engine lights.
I have been working on cars for a while and know my way around cars but electrical work on BMWs is not my forte. Any help would be appreciated.
The AC compressor does not turn on.
The refrigerant is full (checked and correct pressure according to AC manifold set).
When the AC compressor is disconnected from the body harness and 12V applied from external power source, the compressor turns and AC blows cold inside.
When the AC switch button is pressed, the green light turns on at the button and the engine RPM increases, even with the compressor disconnected.
When the engine is not running, pressing the AC switch button immediately blows the 10A fuse with the compressor disconnected (FL23 in the passenger side interior fuse block).
When the 10A fuse is replaced with a 25A fuse and the AC switch button is pressed when the engine is not running, it does not blow with the compressor disconnected .
However, when the engine is running with the compressor disconnected, pressing the AC switch button immediately blows the 25A fuse (indicating a short).
With that said, the radiator cooling fan does not turn on, even if the coolant temperature is over 230 degrees.
The radiator fan does not turn on when the AC switch button is depressed with green light on.
External 12V power source to the radiator fan turns the fan on.
Jumper between pin 87 and 30 of the stage 1 fan relay turns the fan on. It is not the relay as I swapped 2 other known working neighboring relays from the under hood fuse block.
NO check engine lights.
I have been working on cars for a while and know my way around cars but electrical work on BMWs is not my forte. Any help would be appreciated.
#3
Yes after spending stupid amounts of hours, I found that someone who worked on the car in the past stripped the insulation of the 2 wires going to the A/C compressor and twisted the 2 wires together intentionally shorting the 2 wires. He did it upstream enough from the compressor so it was hidden behind the frame rail and he taped the 2 wires together so you would never know about the sabotage unless you knew exactly what you are looking for.
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viper133
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07-23-2010 03:06 PM