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#1
03-16-2008, 11:50 AM
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Did I damage anything?
While trying to test the 2 auxillary fans in front of the radiator on a '91 190E 2.6 I'm refurbishing, I connected the battery to the harness end of the connection rather than the fan on the passenger side fan connection (I think one fan is for the A/C and the other is an "emergency" fan for when the motor gets too hot). What might I have damaged? None of the fuses appear to be blown in the main fuse box.
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#2
03-16-2008, 12:30 PM
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If you hook straight from the battery you won't melt a fuse unless the car catches fire. The circuit you hooked to will either be the battery side or the ground side. Unless there was a reason for the fan to be on the ground side should be open and normally expecting a battery voltage but through a resistance. If it had been grounded you would have known.
You probably did no harm, you were lucky! Never use an unfused jumper unless you really know where you are going and are prepared.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician
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#3
03-16-2008, 01:04 PM
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<<(I think one fan is for the A/C and the other is an "emergency" fan for when the motor gets too hot).>>
The fans are in parellel and both work at the same time..but they have 2 speeds ..High speed fans are triggered by engine coolant temp and LOW fans triggered by A/C high side pressure. Two seperate fan circuits that share the same fan motors.
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A Dalton
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#4
03-16-2008, 05:08 PM
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Quote:
The jumper wire I used sparked at the positive battery pole and got very hot very fast.
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#5
03-16-2008, 05:25 PM
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Opps! Actually the ground side of that connector goes straight to ground so unless the wire melted I don't think you did anything.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician
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