Author Topic: Headlight adjuster motor running randomly  (Read 303 times)

steveha

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Headlight adjuster motor running randomly
« on: April 17, 2018, 03:13:07 PM »
I noticed an intermittent, random whirring noise from the engine compartment recently - see attached MP3 (ZIP wrapped). It happens when driving, stationary or with the ignition turned on but the engine not started. Seems to becoming from the back of each headlight. I tweaked the 0-3 headlight adjuster on the dashboard and got a very similar noise. At night, one can see the headlight beam moving in unison.

Anyone had similar?

Thanks

Steve 09 1.4 ES

Jocko

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Re: Headlight adjuster motor running randomly
« Reply #1 on: April 17, 2018, 03:31:15 PM »
Welcome Steve. The motors are connected in parallel and are supplied via the ignition switch and the adjuster switch. Nothing else of interest. If the lights are moving together the chances are it is a faulty adjuster potentiometer (it is actually a series of switched resistors). Should be easy enough to remove and replace. It may be possible to spray "Servisol", or the like, into the unit while moving it through its range. If not, a part from a breakers would be my option.


steveha

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Re: Headlight adjuster motor running randomly
« Reply #2 on: April 17, 2018, 03:44:18 PM »
Thanks Jocko - I'm inclined to blame the switch too. A squirt of contact cleaner into the  available cracks may have slightly improved it. Do you know how to remove it?

Thanks

Steve

Jocko

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Re: Headlight adjuster motor running randomly
« Reply #3 on: April 17, 2018, 04:03:16 PM »
Probably just prises out. Someone else may know better.

steveha

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Re: Headlight adjuster motor running randomly
« Reply #4 on: April 17, 2018, 05:59:18 PM »
After some detective work, discovered that the panel the switch is on is the interior fuse box cover which the owners manual tells me to pull towards me.....deluged it with contact cleaner fluid and we'll see if that fixed it.

If I have to replace the switch, access to it looks really easy  :)

Molly

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Re: Headlight adjuster motor running randomly
« Reply #5 on: April 17, 2018, 07:28:37 PM »
I get exactly the same noise but thought it was the motors in the climate control, still could be but I'm going to investigate headlamp adjuster now.

steveha

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Re: Headlight adjuster motor running randomly
« Reply #6 on: April 22, 2018, 03:42:30 PM »
Annoyingly, a replacement switch hasn't fixed it. It was OK for a few days but it's started up again >:(

Molly

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Re: Headlight adjuster motor running randomly
« Reply #7 on: April 22, 2018, 04:02:26 PM »
Bugger. I turns out that I have exactly the same fault, and was sort of hoping the switch would fix it.

steveha

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Re: Headlight adjuster motor running randomly
« Reply #8 on: April 23, 2018, 04:29:13 PM »
It's possible that the replacement switch from an 09 model via Ebay just has a similar fault? The part "M37548" seems to be used on various Honda models

Molly

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Re: Headlight adjuster motor running randomly
« Reply #9 on: April 23, 2018, 05:08:18 PM »
It's possible that the replacement switch from an 09 model via Ebay just has a similar fault? The part "M37548" seems to be used on various Honda models

Indeed it is possible to have another faulty switch, I might have a scour around for a new one and see what is what :)

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