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Blower motor causes electrical overheating and short 700 1990

posted by  someone claiming to be Josip Simunovic on  Fri Jul 20 07:53 CST 2001 [RELATED]



A recently bought 1990 740 GLE Sedan came with a non-functioning blower motor. A mechanic / friend discovered that the wiring to the blower motor has been disconnected - apparently by choice. Upon reestablishing the connection the motor, AC and heating seemed to work OK for a while and then burned out the wiring installation and caused a short. It appears that whenever the blower motor is hooked up the wiring proceeds to overheat even when the blower is not turned on - however the motor and AC seem to function OK.

Anyone have an idea what's going on?







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Re: Blower motor causes electrical overheating and short 700 1990

posted by  someone claiming to be John Sargent on  Fri Jul 20 13:32 CST 2001 [RELATED]

Fuse 16 supplies the blower motor and AC. It is supposed to be a 30 amp fuse. The intent of fuses is to protect the wiring to electrical loads. The wire to the blower motor is metic, running from 2.5 to 3.0mm. This is the equivalent of 10 guage. Ten gauge wire will withstand the full thirty amps for hours before giving signs of insulation failure. Has someone bypassed fuse 16 on your car?






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