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Left headlight down machine gun noise! by John W. Tilford
Started on: 10-31-2024 07:18 AM
Replies: 10 (103 views)
Last post by: 1985 Fiero GT on 10-31-2024 08:07 PM
John W. Tilford
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Report this Post10-31-2024 07:18 AM Click Here to See the Profile for John W. TilfordClick Here to visit John W. Tilford's HomePageSend a Private Message to John W. TilfordEdit/Delete MessageReply w/QuoteDirect Link to This Post
This dark morning turned on headlights. Left stayed down. (Reminded me of last year and replacing the headlight control module to fix.) I opened the front hood with engine running and right headlight up and tried to crank up the left headlight with the manual knob. Knob acted weird, like not connected to gear. I continued turning and it clicked loudly. Left headlight was still down but light was turned on. Right was up and on. Got in car. Turned headlights off, right went down. Turned lights on, both went up. Great! As a test I turned them off. Both went down but the left then and now makes a horrible, sounds like gear stripping, non stop noise when it's all the way down. Turning the headlights on raises both, noise stops. When both are down turning the ignition off does not stop the left light loud noise. Drove home with headlights up and pulled into garage. Left the engine running. Did the same tests, same results. Disconnected battery. Engine continued running. Same left light noise when turned headlights off.

More weird: with headlights down & off and noise going, turning on only the running lights (pushing only smaller right side of the switch) the noise stops. With the noise stopped by turning on the running lights I disconnected the battery.

Fiero now sitting in garage, battery disconnected, lights turned off, no noise. Just touching the + red connector to the matching battery post starts the gear-stripping, tiny caliber machine gun noise.

Help!

------------------
John W. Tilford

[This message has been edited by John W. Tilford (edited 10-31-2024).]

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Report this Post10-31-2024 07:34 AM Click Here to See the Profile for 82-T/A [At Work]Send a Private Message to 82-T/A [At Work]Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by John W. Tilford:

This dark morning turned on headlights. Left stayed down. (Reminded me of last year and replacing the headlight control module to fix.) I opened the front hood with engine running and right headlight up and tried to crank up the left headlight with the manual knob. Knob acted weird, like not connected to gear. I continued turning and it clicked loudly. Left headlight was still down but light was turned on. Right was up and on. Got in car. Turned headlights off, right went down. Turned lights on, both went up. Great! As a test I turned them off. Both went down but the left then and now makes a horrible, sounds like gear stripping, non stop noise when it's all the way down. Turning the headlights on raises the right , left stays down, noise stops. Turning the ignition off does not stop the lights on (as one would expect) or the left light loud noise. No noise with headlights up. Yes, they both go up. Horrible noise from left headlight assembly when headlights down. Drove home with headlights up and pulled into garage. Left the engine running. Did the same tests, same results. Disconnected battery. Engine continued running. Same left light noise when turned headlights off.

More weird: with headlights down & off and noise going, turning on only the running lights (pushing only smaller right side of the switch) the noise stops.

Fiero now sitting in garage, battery disconnected, lights turned off, no noise. Just touching the + red connector to the matching battery post starts the gear-stripping, tiny caliber machine gun noise.

Help!




Hi! What year Fiero do you have? 1984-1986 have a different motor from 1987-1988. I only know about the 87-88 motors... but they are rebuildable. There are sacrificial nylon bushings inside... which are meant to break or be destroyed (at least that's my understanding) if the motor receives any kind of significant resistance, rather than destroy something else (like the bucket, etc.). These eventually wear out over time anyway, and need to be replaced.

This is what you need if you have an 87-88: https://rodneydickman.com/p....php?products_id=231

... it comes with new gaskets and bushigns.


But... looking on Rodney's site, it looks like the 84-86 motors are also rebuildable!

https://rodneydickman.com/p....php?products_id=230


I did not know this!


Either way, you need one of these kits... and you might as well do both motors while you're at it.
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John W. Tilford
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Report this Post10-31-2024 07:38 AM Click Here to See the Profile for John W. TilfordClick Here to visit John W. Tilford's HomePageSend a Private Message to John W. TilfordEdit/Delete MessageReply w/QuoteDirect Link to This Post
Sorry! 1988 GT.
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John W. Tilford
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Report this Post10-31-2024 07:50 AM Click Here to See the Profile for John W. TilfordClick Here to visit John W. Tilford's HomePageSend a Private Message to John W. TilfordEdit/Delete MessageReply w/QuoteDirect Link to This Post

John W. Tilford

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Member since Aug 2005
82-T/A,

I just ordered Rodney's rebuild kit with all gaskets. Thank you for the link. Probably need to install anyway.

BUT, is this machine gun/stripping gear noise a typical symptom?

I noticed with the left headlight in the down position turning the manual knob clockwise gets only clicks. Turning the knob counter-clockwise does raise the headlight cradle.
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Report this Post10-31-2024 07:53 AM Click Here to See the Profile for 82-T/A [At Work]Send a Private Message to 82-T/A [At Work]Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by John W. Tilford:

82-T/A,

I just ordered Rodney's rebuild kit with all gaskets. Thank you for the link. Probably need to install anyway.

BUT, is this machine gun/stripping gear noise a typical symptom?

I noticed with the left headlight in the down position turning the manual knob clockwise gets only clicks. Turning the knob counter-clockwise does raise the headlight cradle.



My guess is that the nylon gears broke into big junks, and they're getting caught up in the same place and creating that consistent machine-gun style noise. It's been a LONG time since I've head one of these headlights go bad, mostly because my 87 has been in storage for 14 years, but I do recall one of them making noise as it was failing. It would go BAM BAM BAM BAM... and then "catch" and go up... and make a couple more banging noises when it finally got to the top, haha...


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Report this Post10-31-2024 08:14 AM Click Here to See the Profile for Vintage-NutSend a Private Message to Vintage-NutEdit/Delete MessageReply w/QuoteDirect Link to This Post
2nd Gen Fiero Headlight Motor Rebuild
https://www.bing.com/videos...FDAC83A753&FORM=VIRE

------------------
Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

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John W. Tilford
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Report this Post10-31-2024 08:15 AM Click Here to See the Profile for John W. TilfordClick Here to visit John W. Tilford's HomePageSend a Private Message to John W. TilfordEdit/Delete MessageReply w/QuoteDirect Link to This Post
82-T/A,

Thank you againl!

Might be a while before Rodney's rebuild kit arrives but I'll return to this post to report the results.
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John W. Tilford
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Report this Post10-31-2024 09:16 AM Click Here to See the Profile for John W. TilfordClick Here to visit John W. Tilford's HomePageSend a Private Message to John W. TilfordEdit/Delete MessageReply w/QuoteDirect Link to This Post

John W. Tilford

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Vintage Nut,

Cute video. I'd hire that cheerful young lady. My 51 year old son certainly couldn't do as well.
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cliffw
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Report this Post10-31-2024 12:57 PM Click Here to See the Profile for cliffwSend a Private Message to cliffwEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by John W. Tilford:
Vintage Nut,

Cute video. I'd hire that cheerful young lady. My 51 year old son certainly couldn't do as well.


Another happy cheerful young lady.

Her Father is 82-T/A [At Work] who posted information for you in this thread.

Both amazing women who could run mechanical circles around many men.

[This message has been edited by cliffw (edited 10-31-2024).]

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Report this Post10-31-2024 01:09 PM Click Here to See the Profile for 82-T/A [At Work]Send a Private Message to 82-T/A [At Work]Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
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Originally posted by cliffw:

Another happy cheerful young lady.

Her Father is 82-T/A [At Work] who posted information for you in this thread.

Both amazing women who could run mechanical circles around many men.




Haha, thanks Cliff, I appreciate it.

Yeah, I was really impressed with Lost But Not Forgotten daughter's repair of those headlights. I remember seeing her much younger, and of course she couldn't do anywhere near those things at the age he started her in... but in that one, she was fully engaged, more or less did it herself with only a little bit of help from her dad. Very impressive.
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Report this Post10-31-2024 08:07 PM Click Here to See the Profile for 1985 Fiero GTSend a Private Message to 1985 Fiero GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
As to it not doing that on parking lights, the headlight switch is really 3 switches,

Headlights down (sending 12v when switch is in off position, not activated in any other position)

Parking lights on (sending 12v when switch is in parking lights or headlights position, not activated when off)

Headlights (sending 12v when switch is on headlights, not activated in any other position)

So in parking lights, there is no power being sent to the motors, either up or down, they will stop wherever they currently are. There should be a single wire connector to each motor you can disconnect that will allow the motor to go up but not go back down, so turning headlights off will have no noise/battery drain, at least that's how the gen 1 is, I would think the gen 2s would have that safety disconnect to, but I don't know.
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