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i have a 1995 Volvo 850 series, 2.4 non turbo. My fan is not running either, the relay block has two yellow connetors in the middle, I know these are what control the low and high fan speed. fan test ok for running but when I ground jump the two center relay connectors for the fan speed the fan will not run, acts like there is no power getting to the relay block. thanks, Ken

@fathertime24 not sure what you mean by ground jump the two center relay connectors . checking the wiring diagram for your Volvo these do not go to ground and shortening those to ground most likely will not accomplish anything. If anything applying a jumper from B1 to B2 on the relay would bypass the control module.