Electrical Behavior
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Joined: Aug 2015
Posts: 55
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From: Hanover PA
Electrical Behavior
So I decided to replace my exhaust from the manifold back. Dropped the starter to get to the collector. After putting the starter back on and connecting the harness back, I now have a buzzing noise behind the drivers seat, and the A/C fan turns on as soon as I connect the battery. Did not do this prior to dropping the starter. Any ideas what is causing this?
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Joined: Aug 2015
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From: Hanover PA
Burning Brakes
Joined: May 2013
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From: Los Banos CA
Have you looked to see what is buzzing? I'm guessing you have a later year (78+)? I don't know what years started putting electronics behind the seats, but I know the early years didn't have anything but wires back there.
Is it possible that you inadvertently 'fixed' a ground issue? The fan motor on 78+ is supposed to run on low speed at all times (at least with AC).
Is it possible that you inadvertently 'fixed' a ground issue? The fan motor on 78+ is supposed to run on low speed at all times (at least with AC).
Thread Starter
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Joined: Aug 2015
Posts: 55
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From: Hanover PA
Have you looked to see what is buzzing? I'm guessing you have a later year (78+)? I don't know what years started putting electronics behind the seats, but I know the early years didn't have anything but wires back there.
Is it possible that you inadvertently 'fixed' a ground issue? The fan motor on 78+ is supposed to run on low speed at all times (at least with AC).
Is it possible that you inadvertently 'fixed' a ground issue? The fan motor on 78+ is supposed to run on low speed at all times (at least with AC).
It's a 1981. The fan runs when I connect the batter, no engine running. I'm wondering if I got the connector on backwards at the temp sensor that is under the passenger side manifold.
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Joined: Aug 2015
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From: Hanover PA
Ok, so the connector was the issue with the fan. But the buzzing is still there. It comes from a circuit board with a silver box on top, about 2.5 inches square, in the jack compartment, and energizes a relay under the console. I can hear the relay click when the buzzing starts.
2026 Loser of the Year
Joined: Sep 2013
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From: New Or-leens Loo-z-anna
Check a wiring diagram for your year model to see which wire is accidentally supplying 12v to the relay with the key OFF.
(Member "Papawana" will email you a free wiring diagram if he has one)
(Member "Papawana" will email you a free wiring diagram if he has one)
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