Youll need a voltmeter and a wire pierceing end .. if not then a small cut into the wires with a blade to access the copper.
You will need tape to seal the wires after so a probe is best .. see image .
Over view of the system ..
A/C turned on and the low speed fans will be operated , it doesnt matter if the a/c is out of gass .. the car doesnt care .. it will still increase the engine rpm and turn on the low speed fans .
Low speed fans will kick in reguardless at an engine temp of about 95 C .
High speed fans will kick in at an engine temp of about 105 C .
3 wires on the resistors ..
One goes to the fan motor
One comes from the Low speed relay
One comes from the high speed relay.
The high speed by passes the resistor in that steel caseing .. it goes straight to the fan.
You dont need to know which wire is which but there is a diagram below if you want to look .. dont help much as the colours of the resistor are white , white/green and green which it doesnt show .. lol .
Engine running , a/c turned on then check each wire for 12 volts .. if the resistor is working then x2 of the wires will have a feed and the fan will be turning ... if the fan isnt turning then you have a faulty fan motor.
A Failure of the resistor will mean you only have feed on x1 wire .. no output to the fan motor .
You can replace the resistor with non porsche that are listed in other posts .. perhaps someone could add a link here for me .
If replaceing with a Porsche one then you can either strip out the arch liner or you can cut and join .. soldering iron will be required along with heat shrink and tape .
You will need tape to seal the wires after so a probe is best .. see image .
Over view of the system ..
A/C turned on and the low speed fans will be operated , it doesnt matter if the a/c is out of gass .. the car doesnt care .. it will still increase the engine rpm and turn on the low speed fans .
Low speed fans will kick in reguardless at an engine temp of about 95 C .
High speed fans will kick in at an engine temp of about 105 C .
3 wires on the resistors ..
One goes to the fan motor
One comes from the Low speed relay
One comes from the high speed relay.
The high speed by passes the resistor in that steel caseing .. it goes straight to the fan.
You dont need to know which wire is which but there is a diagram below if you want to look .. dont help much as the colours of the resistor are white , white/green and green which it doesnt show .. lol .
Engine running , a/c turned on then check each wire for 12 volts .. if the resistor is working then x2 of the wires will have a feed and the fan will be turning ... if the fan isnt turning then you have a faulty fan motor.
A Failure of the resistor will mean you only have feed on x1 wire .. no output to the fan motor .
You can replace the resistor with non porsche that are listed in other posts .. perhaps someone could add a link here for me .
If replaceing with a Porsche one then you can either strip out the arch liner or you can cut and join .. soldering iron will be required along with heat shrink and tape .