Annoying fast ticking/static-like sound from the instrument cluster

[Jugostran]

Hey all.
I've been having an issue with my BX that has finally gotten on top of my nerves. Namely there is this annoying ticking/static noise coming from the instrument cluster. I am pretty sure it's the speedometer cable.
I'd like to make it go away because the car is essentially impossible to drive as is. Imagine an old out of tune CRT TV in the cabin with you at all times. Not ideal.
Anyone have any tips or tricks, or had this issue before? Asking because I could theoretically install another speedometer cable, but it'll be a used one, so it may have the same issue. I'm just curious as to where the noise comes from and can it be silenced with lubrication/cleaning.
Thank you!

[Dave_16v]

By the sound of it, the needle isn't fluctuating because you likely would have said so. I don't know if your cable is the same as mine in two halfs, I think it might be but either way, they must take the best route from the drive to the speedometer. You could try pushing or pulling it a little from the engine bay to see if it alters but if part of the cable is worn, it will get worse until you fit a different one. Getting some form of lubricant in there may help of course.

[Jugostran]

By the sound of it, the needle isn't fluctuating because you likely would have said so. I don't know if your cable is the same as mine in two halfs, I think it might be but either way, they must take the best route from the drive to the speedometer. You could try pushing or pulling it a little from the engine bay to see if it alters but if part of the cable is worn, it will get worse until you fit a different one. Getting some form of lubricant in there may help of course.

That is correct. It's not fluctuating. Actually, that's not entirely correct. It is, but its really slight and doesn't bother me. The speedometer is accurate enough. The problem is that irritating sound. Mine is two parts, just like yours. I already tried lubricating, but the noise is still there. All the lubricant did was improve the fluctuations (now they are way less noticeable).

[Dave_16v]

I think a lot of problems are caused by the routing and ensuring the it puts as little stress on the cable as possible, especially towards the point it gets near the binnacle.

[Jaba]

The cables do wear and get noisy and the speedo head can do likewise too. Have you tried disconnecting the cable at the speedo end for diagnosis before fitting a replacement cable.

[Jugostran]

The cables do wear and get noisy and the speedo head can do likewise too. Have you tried disconnecting the cable at the speedo end for diagnosis before fitting a replacement cable.

I haven't. Last I checked the section which plugs into the speedo was stuck.