WTF is a Clock Spring....and can it be fixed??

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hillsy v2
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WTF is a Clock Spring....and can it be fixed??

Post by hillsy v2 »

So something a little different today - working on a car.

The controls on the steering wheel stopped working some time back - first it has the LHS cluster which controlled the audio....then the RHS gave up which is annoying because that's the cruise control.

Anyway - this is the candidate: 2008 ZG Mitsubishi Outlander

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And this is the steering wheel with the console buttons (those are volume controls on the far left which have taken a beating over the years....)
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Now you will notice that is an airbag on the steering wheel - which needs to come out - so safety first - undo the battery and let it sit for at least 5 minutes...
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Then we are good to go. So the airbag is held in place to 2 torx screws on either side of the steering wheel
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Once they are removed the airbag will pull straight out
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And here is the connector on the back of the airbag unclipped - general rule of thumb with cars nowadays is anything to do with SRS will have yellow connectors. Horn is also unclipped in this pic (single black connector)
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And then unscrew and unclip the controls (2 x phillips screws)
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Steering wheel is fixed with a 17mm nut. At this point you are probably best to ensure the steering wheel is in the centre position for ease of re-assembly in the correct spot. Undo the nut (not all the way) and then tug on the wheel. They are slotted so they will come off fairly easily.
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And THIS is the thing we are after - the SRS Clock Spring...
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It's held in place with 2 phillips screws which are behind the steering column shroud (you'll notice I have already removed the connectors at the bottom of the spring in this shot)
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Jeez - a bit of crap in there...
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And thar she blows!
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So I took it upstairs to have a deeper look...the two halves of the unit are lust held together with 3 press clips (you can see them on the retainer ring at the LHS of the pic)
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And inside it's simply a flat wire arrangement coiled up so it can rotate about 7 turns lock to lock (the steering on the car is about 4 turns lock to lock)
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Now I would like to say I had a win with this - but unfortunately the cable strip was broken about half way along the roll. This pretty much co-incides with where the steering wheel is at centre - which is where the cable is most of the time and is pretty much always bent at that point.
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The cable is not a typical copper wire strip arrangement - it looks like a plastic strap impregnated with a conductor. You can't really do much with this except replace the wire strip - or ultimately - the whole unit. They are only about $80 but this car is going to be sold soon as we have a new XTrail in the fleet....so I probably won't bother.

So there you have it. Most cars with a central horn and / or steering wheel controls will have this kind of arrangement. And to be honest it was a lot simpler than I had thought it would be.

Lechy
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Re: WTF is a Clock Spring....and can it be fixed??

Post by Lechy »

It takes its name from the "hair spring" in a clock or watch which is in constant movement partially rotating clockwise and counter clockwise.
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What you have is a simple ribbon cable used extensively in computers. Maybe a computer repair shop can get you sorted.
Grow old disgracefully young man.

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hillsy v2
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Re: WTF is a Clock Spring....and can it be fixed??

Post by hillsy v2 »

Lechy wrote:
Sat Apr 06, 2024 9:32 pm
It takes its name from the "hair spring" in a clock or watch which is in constant movement partially rotating clockwise and counter clockwise.
Image

What you have is a simple ribbon cable used extensively in computers. Maybe a computer repair shop can get you sorted.
Yeah but the problem is the cable is about 2 metres long....and it's broken in the middle. Probably not worth getting fixed when a whole new unit is $80.

I've actually got an idea on this for a fix but I'm waiting on the stuff to do it. I'll post when I look at it again.

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Re: WTF is a Clock Spring....and can it be fixed??

Post by navigator »

Duct tape fixes everything. :Cool:

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hillsy v2
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Re: WTF is a Clock Spring....and can it be fixed??

Post by hillsy v2 »

navigator wrote:
Sun Apr 07, 2024 7:16 am
Duct tape fixes everything. :Cool:
Yeah kinda.....

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sgtcall
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Re: WTF is a Clock Spring....and can it be fixed??

Post by sgtcall »

Here is a OEM replacement for 60$
https://www.mitsubishiparts.com/oem-par ... g-8619a018

OEM / Interchange Numbers: 8619A018

And a write up on them.
https://blog.vierol-shop.de/en/clockspr ... ing-wheel/
If you have any type of electrical issue, have your battery load tested before you do anything else. Any auto parts store will test it for free.

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hillsy v2
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Re: WTF is a Clock Spring....and can it be fixed??

Post by hillsy v2 »

sgtcall wrote:
Sun Apr 07, 2024 5:06 pm
Here is a OEM replacement for 60$
https://www.mitsubishiparts.com/oem-par ... g-8619a018

OEM / Interchange Numbers: 8619A018

And a write up on them.
https://blog.vierol-shop.de/en/clockspr ... ing-wheel/
Hey thanks sgt but those guys don't ship outside of USA.

I had another look on eBay and I found an aftermarket one for $26 AUD. We'll see how that goes.

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