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International Automotive Technicians Network
Re: Mercedes R350 Cooling fan turning on with vehicle off
Posted to Technical Discussion Forum on 2/28/2017

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Fuses 100 through 108 are all 87 power:

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They should only have power when the key is on and the relay closes.

See if you can light a real test light off of that 6.5V with the key of... Login to read more.