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Anyone have a wiring diagram for ac condenser fan 2003 Mercedes G500?
ac Freon fully charged compressor works ac fans are not operational however i can send a command with star diagnostic and fans would come on .
Customer Concern: Condenser fan not coming on. A/C pressures on the high side max out.
Average Reported Mileage: 132000
Tests/Procedures:
1. Inspect 40 amp fuses #7 and #8 located in the driver's side of the dash.
2. With a scan tool, perform activation of cooling fans. This is done with communication to the Front Signal Activation Module (SAM).
3. If both fans are not working, test for faulty left fan relay. If only left fan works, test for faulty right fan relay. Swapping of the relays as long as they are the same part number will help in diagnosis.
4. If fans activate with the scan tool, verify that refrigerant pressure sensor is reading correctly and that the version coding of the Electronic Ignition Switch and the Signal Activation Module (SAM) is correct.
Tech Tips: The Signal Activation Module (SAM) operates the left relay. The left relay (labeled K9/1 on wiring diagrams) operates the right relay (labeled K9/2 on wiring diagrams). Relays are located above the fuse panel on the right side (front of car) of the center console. B105 Component K9 (Auxiliary fan stage 1 and 2 relay) has short circuit to ground (Series 463).