Heater,A/C blower
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
Heater,A/C blower
76 vette heater blower works fine on low settings but shuts off when selected on high. Read something about relay causing this. If so where is the blower relay located. I thought it was just above and a little inboard of blower in engine compt but when I disconnect it blower still runs. Dave
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
IF you can, follow the wire from the blower motor- it should lead to the relay. (And that does sound like your problem, BTW). Not 100% sure of it's location, but the usual spot is on the firewall. My 69 has it under the left fender, and in '82 it's on the firewall.
Advanced
Joined: May 2006
Posts: 71
Likes: 0
From: Minnedosa MB
It is on the wire harness that goes to the passenger side kick panel under the dash. Your in luck, I am installing a new A/C system right now and have the complete blower assembly out of my car. I can send you a picture if you PM your email. Mine is a 76'
Safety Car
Joined: Oct 2004
Posts: 3,725
Likes: 5
From: Minnesota
The fan relay on my 75 is mounted in the engine bay right next to the blower motor. Either the relay is bad or the wiring leading to it is bad. I replaced the corroded inline fuse going to the relay in mine with a more modern blade type to eliminate this problem. A simple voltage light will tell you where the problem is.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
The Corvette Electrical Troubleshooting Manual for your year is a great resource.
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Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
OK guys thanks for the help it was the relay. Never found that fuse. Relay located on firewall near hood switch. Two plugs one has three wires.
Purple=power to blower
Light blue=switched power to relay
Red=Power to relay from buss
Single plug=Ground
Thanks Dave
Purple=power to blower
Light blue=switched power to relay
Red=Power to relay from buss
Single plug=Ground
Thanks Dave
Last edited by Dave Witman; Mar 28, 2008 at 04:43 PM.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Was the relay fried, or was it a bad connection?