marinabrid Posted July 5, 2007 Report Posted July 5, 2007 (edited) hi all tdi 90 97 year the top rad hose runs to a plastic housing with a 4 wire sensor in then another water pipe out to the engine its before the coolant sensor though , can someone tell me what its for, is it the fan , although there is a big 2 wire switch with thick wires on the radiator side. i think its the water temp sensor to kick the fan in when needed but i just want to confirm this, also would it give a fault code if its gone faulty ? thanks Edited July 5, 2007 by motorcareman Quote
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