Re: [Chrysler300] buzzing Hurst

["Thomas Miller" <tfm@xxxxxxxxxxxx>]

Folks,

I had a '70 Sport Fury GT many moons ago with the same setup.  The headlamp motor has a limit switch in the motor itself that is supposed to shut the motor off in the fully opened and fully closed position.  The limit switch is triggered by a small plastic cam that fits on the shaft of the gear that rotates the rod that operates the headlight doors.  That little cam wears out.  The result is that the motor will crank the doors all the way open against the stops, but the motor is still energized.  Back in those days, there was a kit available from Mopar parts that replaced the gear and the cam.  That's what'll fix it!

Unplug the motor and manually open and close the headlights with the knurled knob on the bottom of the motor untill you get it fixed.  Otherwise, you'll more than likely fry the motor.  

I have a '70 service manual and parts book.  If you'd like, I'll dig out part numbers and see if there's an illustration of the assembly.

Best Regards to all,

TFM


Thomas F. Miller
tfm@xxxxxxxxxxxx 
'57 300C

>>> whuff <whuff@xxxxxxxxxx> 9/15/2007 10:53 AM >>>
On my 70 300, the buzzing was related to the headlight positions.  It 
seemed as though the lights were all the way open (on) and the 
mechanism was still trying to open them a little more, hence the 
buzzing.  It was several years ago and I can't remember now exactly 
what I did, I believe it may have been some adjustment of the 
electric motor mounting which I think is slotted.

Bill Huff



At 9/15/200709:55 AM, mwl1967@xxxxxxx wrote:
>John,
>              My  '70 Charger does the same thing. It's the headlamp relay
>under the dash,  attached to the lower dash with a single phillips 
>screw on my
>car, possibly  similar or maybe plugged into the fuse box on yours.  ( I'll
>check my '70  300 this weekend )
>
>             Anyway,  the buzz continued even after I replaced several good
>used relays with an  oem, nos piece. The headlamp motor was nos 
>also.  I've been
>told that the  contacts inside the motor may be out of adjustment causing the
>relay to think  that the lamp doors are still open and hence, not shutting
>off the current (  because it wants to close the headlamp doors 
>).  This causing
>the contact  points inside to buzz. I'd disconnect it until you figure it out
>rather than  risk burning out the relay.
>
>         If you figure it out please  let me know.
>
>Mike Laiserin
>Phoenix, Az
>
>
>
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