C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Strange sound?

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Old Mar 24, 2007 | 02:18 PM
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Default Strange sound?

Recently I hear a spinning/clicking sound when I shut the car off for 3-4 seconds, only occasionally though. Comes from the engine bay, lights are not up/on.
I checked the fans, but they seem ok and when I had them on and turned off the car, I didn't hear anything. Nothing looks wrong that I can see.

Any ideas on what it could be or what to check?
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Old Mar 24, 2007 | 02:22 PM
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You don't have a Tornado installed, do you?
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Old Mar 24, 2007 | 07:11 PM
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lol No, but good thought!
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Old Mar 24, 2007 | 07:58 PM
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Not unusual at all. Sounds like the engine cooling fan just 'spinning down' once the power is turned off to it. It would only happen if the temp was hi ehough to have it running, or ac on, when you parked it.
That would be why you don't always hear it.
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Old Mar 24, 2007 | 08:05 PM
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check them headlites...

It does happen for some reason... I haven't tracked it back yet.
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Old Mar 25, 2007 | 12:18 PM
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Yep, I went out last night to find that only 1 light came up!
I don't understand why it was making the motor run when the headlights were never on?

I believe this is the same headlight I replaced the bushings in a year or more ago. at that time it would turn partially or at least try to turn. It doesn't try to turn at all now, and no sound. Does this sound like the motor is gone? How do I check?
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Old Mar 26, 2007 | 12:50 PM
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TTT

Where are the relays located for the motor? The light is coming on, but I would think the power for the motor is seperate?
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Old Mar 26, 2007 | 01:59 PM
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Originally Posted by 95wht6spd
TTT

Where are the relays located for the motor? The light is coming on, but I would think the power for the motor is seperate?
Look in the left front fenderwell. It is a module, not a relay, and located close to the frame down low in front of the left front tire. Four wire connector on each side of it and the module is about 1 1/2 thick and about 4" square. Before you go there disconnect the wires at the motor and check for current. Should be just two wires and polarity reverses according to going up or down. Hope this helps.
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Old Mar 27, 2007 | 07:07 PM
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Can you adjust the light all the way around by turning the motor ****, or is it just for small adjustments?
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Old Mar 27, 2007 | 11:18 PM
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check the headlight motor, it may spin when you turn off the lights and the gears are bad. ran across this in tech a few min. ago.
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Old Mar 28, 2007 | 01:14 AM
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I think mine makes the same noise, it's my headlight. Not sure what it's doing, or what makes the noise, but I'm sure I will find out when it breaks!
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Old Mar 28, 2007 | 08:23 PM
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I replaced the bushings a year or more ago, so it shouldn't be that, and it doesn't even try to turn now.

I don't think it is getting any power, but I have a feeling the motor has gone out, since it was making noise and working, and now nothing.

I think it may have a limit switch which would operate partially and make the motor run for some reason, hence the noise when the lights were off.

My friend and I are going to trouble shoot it this weekend and hopefully fix it. We may be able to rebuild the motor if it's dead.

Any tips or other things to check would be helpful before we start on it.
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Old Mar 30, 2007 | 10:07 PM
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Ttt
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Old Mar 31, 2007 | 01:32 PM
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Tested it today , and looks like the motor is bad.
Top **** will not turn easily, and will not turn headlight at all.

How come the headlight motor receives 12vdc whether the headlight switch is on or off?

I'm going to remove the motor now, maybe I can fix it, but probably not.

Where is the best place to send to be repaired? Ecklers has a refurbishing service for $140.
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Old Mar 31, 2007 | 04:09 PM
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Took it apart, and this is strange, but the hollow bushing I put in 2 years ago were all flatended out! There were .324" size, I was thinking they were supposed to be .25? I'm going to Lowes to see if they have sold bushings. Maybe I will get lucky and this was just binding the motor and maybe it's not burnt out.

I opened up the motor and it looked fine, but I don't really know what to look for...
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Old Mar 31, 2007 | 05:56 PM
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OK....need some replies.....

I replaced the bushings and the motor now runs, but only on the driver side, it will not actuate on the passenger side, but the light does come on?! My friend said there was no voltage on the passenger side for the motor wires, but we didn't know where else to look or how to check the module.

Where is the relay for the passenger side headlight motor?
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