Vette 73 Blower Switch/Fan/Relay
Thread Starter
Racer
Joined: Sep 2006
Posts: 251
Likes: 0
From: Victoria Australia
Vette 73 Blower Switch/Fan/Relay
Hi, I have had my vette (73) for a week and needless to say Iam a very happy man. Problem is the fan switch is all screwy. The speeds are all over the place. Off seems to be low, Hi is off and the two mid speeds are around the wrong way. I have checked the wiring on the switch as well as the resistor and the relay and they are as they should be. But the relay has a vacant terminal were there should be an orange wire feeding power from the horn relay. I intend to run a fused wire to this, but where do I find the horn relay?? And even when I do this I wouldn't think that would be the cause of the screwy fan settings? Being a new vette owner I just need some advice before I go messing around with it. Oh, the car has a/c if that makes any difference.Thanks in advance. Cheers Bluey
Melting Slicks
Joined: Mar 2002
Posts: 2,140
Likes: 7
From: Ohio
To start I bet you have Air Conditioning. The fan runs slow in the off position on most 73's with air. In the highest speed if it will not run their is an inline fuse in the area under the master cyclinder that I belive is burnt out. It may be a red wire at the horn relay changing to yellow after the fuse holder. I know the color changes but not sure on the colors. Let me know what you find.
Safety Car
Joined: Aug 2001
Posts: 3,685
Likes: 202
From: Waterford Mi
The horn relay is mounted above the drivers side front tire, There is suppose to be a relay that snaps onto the AC evaperator that engages when you put it on high. On mine the PO let it fall off and the plug melted apart on the exhuast manifold. The other speeds are conroled by resisters mounted on a plate that fits inside on the top of the fan box against the firewall.
Thread Starter
Racer
Joined: Sep 2006
Posts: 251
Likes: 0
From: Victoria Australia
To start I bet you have Air Conditioning. The fan runs slow in the off position on most 73's with air. In the highest speed if it will not run their is an inline fuse in the area under the master cyclinder that I belive is burnt out. It may be a red wire at the horn relay changing to yellow after the fuse holder. I know the color changes but not sure on the colors. Let me know what you find.
Race Director
Joined: Jul 2004
Posts: 12,706
Likes: 329
From: Scottsdale Arizona
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