dont know if you have exactly the same problem i had with my '91 245 but after replacing the blower motor/resistor/switch, i blew up the radiator at the upper neck on driver's side (dont ask, too painful). coolant shit sprayed all over the engine compartment and bit found it's way through a hole in the firewall and sprayed the top of the fuse holder...quite a mess. well, the blower motor didnt turn on when i put the switch to 1-2-3-4 positions but was barely humming while the switch was in the off positon. wtf? perplexed, i started a very whiney post and art benstein was kind enough to suggest i check fuse #3 (blue, 25amp). sure enough, it was blown (from being covered with coolant shit). changed the fuse, cleaned up the fuse holder and the blower motor/switch acted like normal. still going (knock wood!). cant hurt to look at fuse #3. just a thought...
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oceanre 91 240 wagon 292k