Wasting time from my experience. Every single one I've tried to fix was pretty much destroyed in side. Brushes melted to other parts. I went to the auto parts store and bought a universal fan, made it fit in there(easy) and now I have a working fan, which if your car is in good shape, I think it's only needed for AC, or at least on my 240 only comes on when the AC is running on a hot day. But then I dont know a thing about those complicated systems on the 300's. Max
On Tue, May 6, 2014 at 10:10 AM, Bud S <budski252@yahoo.com> wrote:
Well, I purchased a voltmeter that plugs into the cigarette lighter because I wanted to know what was going on.
I think I've partially figured it out. I've noticed when the temp gauge goes to about 110C my voltage was dropping and the car wasn't cooling off at speed unless I went downhill or flat and level.In stop and go traffic at about 110C the car would cool to about 100C. My aux fan would never come on. So the engine driven fan is working. It was hot out here last week so I'd figure the road temp was at 100F+. Otherwise flat and level she's been running about 90C.
So I wired up a fuse and connected the aux fan to the battery and promptly blew the fuse. I used a 10 amp fuse and I think the circuit uses a 15. I decided to take the fan off this morning to inspect. It seems stiff. I've read where the bearings aren't sealed so I was thinking of tearing into it and see if I can clean them or replace them with sealed bearings.The A/C is not working right now as my climate control system is a mess and I'm going to be working on that after I get the drivability problems (like the battery charging and temp issue) sorted out so that I don't have to worry about da wife using the car.Anyone on list tear into an aux fan or am I wasting my time?Thanks,Bud1979 300SD
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