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Why would a new blower motor for a 1994 Chevy Astro Van not run on high speed?
Wiki User
∙ 15y ago
Raymond meynet * Answer
*
I will answer my own question,as I managed to track down the problem myself. There is a relay that kicks the blower into high speed that is mounted just above where the blower is on the firewall that relay is controlled by the dash switch and probably something else. The feed (power) for the high speed relay is tracable all the way back to the back side of the fuse block on the inside of the engine compartment on the fire wall right behind the battery. There is a plug that connects to the smaller battery terminal lead that feeds the fuse block and this plug has 4 larger wires aproximately #10 wire coming out of that plug. This appears to be some sort of in line fusing arrangement. The far right hand wire is the power source for the high speed relay. This feed was open inside the plug as in goes into the back of the main fuse block. It seem to have gotten hot and melted the plastic around the connection on this plug . Cleaning the melted plastic out and doing the best I could to reestabliish a good connection has allowed my blower to run on high speed again. If the problem reoccures I will have to pick up a new feed for the relay probably right on the terminal that feeds the fuse block itself. Any suggestions as to how better do this is welcome.
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∙ 15y ago
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