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Blower motor fuse rating
Posted by Wingerr (more from Wingerr) on Sun, 25 Mar 2007 08:01:29
In Reply to: Re: 1987 SAAB 9000t Fuse Box Wiring Diagram, Ron Johnson, Fri, 23 Mar 2007 19:37:16
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More of a general question for the Saab blower motors; how many people have had their blower motor fuse blow before something else in the system "blew", like a wiring meltdown, blower control module (for the later years) failing?
I've decided to run with a 25A fuse instead of the 30A specified just to give me a bit more advance notice that the blower motor current draw is ramping up, to give my blower control module more of a chance. Last measurement I made on the blower motor current was in the range of 18A max, so I figured it has enough leeway to run the lower fuse rating.
In addition to checking the blower motor current draw, try to make sure the contacts and tension on all related contacts and connections are nice and tight, because even with normal draw, if the contacts are loose or dirty, the high resistance can definitely overheat the local wiring at the connections and cause the meltdown. Preemptive maintenance might prevent later problems.
posted by 72.68.215...
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