blower motor resistor?
Burning Brakes
Joined: May 2008
Posts: 1,165
Likes: 24
From: Boston MA
If this is a typical DC motor set up, the high position would bypass the resistor sending full voltage to the motor to turn max speed. There must be a connection or wire that is seperate of the resistor from the power source to the fan. Do you have a wiring diagram?
Pro
Joined: Feb 2009
Posts: 592
Likes: 0
From: Richmond TX
It's gotta be there,, but if i remember, the power take off point was moved on later years, don't know where to though. Best way to look for it is to find the power block, it's just a small metal screw down, directly (1/2") under the horn relay. It comes off red, goes to fuse, goes out org. Wires coming off of there go several places, on of them goes to the fuse. if it's not there, post your year and and question for it's location on forum.
designed that way. no CO.
it goes from the fuse, then into a wire harness over to the blower motor relay.
designed that way. no CO.
it goes from the fuse, then into a wire harness over to the blower motor relay.
Melting Slicks
Joined: Oct 2006
Posts: 2,417
Likes: 336
From: Texas
dont give UP, 78 is a little different from older models. orange wire goes from selector switch to high speed blower relay.and controls it, it has no inline fuse, uses the same fuse as rest of ac system.
there is a red wire on high speed blower relay that supplies power directly from starter positive terminal to the blower motor. that red wire goes through a large connector with several wires right above the right valve cover next to ac box. check that connector for corossion and power.
http://www.corvetteforum.net/c3/tune.../index16.shtml
connectors are shown at bottom of page in figure C & D c406 c403
http://www.corvetteforum.net/c3/tune...l/index8.shtml
there is a red wire on high speed blower relay that supplies power directly from starter positive terminal to the blower motor. that red wire goes through a large connector with several wires right above the right valve cover next to ac box. check that connector for corossion and power.
http://www.corvetteforum.net/c3/tune.../index16.shtml
connectors are shown at bottom of page in figure C & D c406 c403
http://www.corvetteforum.net/c3/tune...l/index8.shtml
Last edited by speedreed8; Jul 5, 2012 at 10:09 PM.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
dont give UP, 78 is a little different from older models. orange wire goes from selector switch to high speed blower relay.and controls it, it has no inline fuse, uses the same fuse as rest of ac system.
there is a red wire on high speed blower relay that supplies power directly from starter positive terminal to the blower motor. that red wire goes through a large connector with several wires right above the right valve cover next to ac box. check that connector for corossion and power.
http://www.corvetteforum.net/c3/tune.../index16.shtml
connectors are shown at bottom of page in figure C & D c406 c403
http://www.corvetteforum.net/c3/tune...l/index8.shtml
there is a red wire on high speed blower relay that supplies power directly from starter positive terminal to the blower motor. that red wire goes through a large connector with several wires right above the right valve cover next to ac box. check that connector for corossion and power.
http://www.corvetteforum.net/c3/tune.../index16.shtml
connectors are shown at bottom of page in figure C & D c406 c403
http://www.corvetteforum.net/c3/tune...l/index8.shtml
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