Hi guys; thanks for everybodies response on thefront fan. Yes its a 85 300td wagon. and front fan runs off A/C , found the fuses ,relay & sender. I put direct current from the battery to the fan & the fan goes on

So how can I ck the relay & sending unit? The reason I'm confuse is because the A/C does not work but the fan went on when engine temp. got hotter

Can anyone tell me what I need to do

Thanks again