Another windows slow/non-working question

Hello together,

this might be a question for the electricians.

While driving home from my tire shop this morning after I got my fresh set of Michelin Exaltos, the driver's side window stopped going up. Going down still worked.
It began a few weeks ago, that the window got very slow once again and I was already prepared for the dreaded motor/gear out job.
But this time it was just the switch. I replaced it with one of the used ones, still working, which I have.

Now my question. The reason for the failing switches are eroded/burned contacts inside. Scraping them clean can help restoring the function, but it takes not too long, till the problem reappears.
Apart from installing a relay circuit, what I want to avoid.... would a little bit of conductive grease protect the contacts to stretch the lifetime of the switches?

My conclusion is also, that the reason for slow windows is not always the mechanism and the hardened grease inside the worm gear, but it can be caused by increased resistance of the switches too. At least this can add to the malfunction.
Now, that I have -temporarily- clean switch contacts, my window is as fast -better said, slow- like always.

At the moment I just aim at increasing the lifetime of the contacts. Therefore my idea with the conductive grease, about which manufacturers say, that they reduce electric erosion on switch contacts.
What do you folks think?

Best Regards and thanks in advance
Martin

 

Brian,
the full voltage to the motor should be doable with an additional wire from the battery to a relay, or not?
I just do not know, how to pull one more thick wire through the door harness.

Apart from the fact, that I still have all the voltage loss upfront; Just to protect the switches; would something be said against using the same voltage supply for both relay terminals 30 and 86?
Just offhand I think, 85 to the windows switch, 87 to the motor then.

Best Regards
Martin

 

I know. But I don't get it, why it should not work on my car. And noone can explain, what should be different on my car than on the compatible cars according to that list:

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Best Regards
Martin

 

Thanks. Protecting the switches is the way I want to go. If it accelerates the windows a bit as a side effect, it would be nice, but not so important for me.
I did the motor/gear out and cleaning/regreasing job last year on the passenger side and it's now one second slower, than on my modern Fiat daily driver.
Rodney's solution convices me more, than the solution I have shown (from Superformance UK). But basically it's a two relay solution, which requires additional hot wires into the doors (since the switches are in the armrests), what scares me off a bit yet.
I have converted my headlights circuit to a relay circuit. Also just to protect the stalk contacts. Driving in the dark, worse when it's raining too, is still a major pain.

Best Regards
Martin

 

Hi Andrew,
plus the 'slow window part', to which the resistance of the switch contacts contribute to. This was the biggest part on mine during the past weeks, till the switch failed completely yesterday.

Hi Robert,
can you tell me more about these kits or show them? Or a link?

Best Regards and thanks in advance
Martin

 

Thanks Robert,

wow! That's a lot of money for this purpose. And honestly, too much for my taste.
I will investigate further, how much the switches contribute to the slow window effect and pull the wires later this evening bypassing the switch.
Will report, how long it will take to close the window.

Best Regards
Marti

 

Just did a quick check. With the engine not running: 5,5 sec. on driver's side. 5sec. passenger side from fully open till closed. All switches freshly cleaned.
With 12V from a 12V/8amps mains adapter directly on the window motors (adapter not stabilized, delivers around 13V when load of the window motors is applied) roughly half a second faster.
I could perfectly live with these values, but burned, eroded switch contacts are not acceptable.
I will now try for a few weeks or months, whether conductive grease changes the situation. If not I will install a two relay solution per side.I have a bucket full of closing contact Bosch relays, with which it should be possible to make something appropriate.

I agree with Brian, that the root of the problem is motor torque and I'm surprised, that noone came up yet with more powerful motors. I have a dream, that somewhere out there a 12V-DC-motor exists -maybe for any industrial application- in a size which allows to adapt it to the existing gear. Gear is o.k.

Best Regards
Martin

 

On mine it is.

Best
Martin

 

Robert,

I actually also thought about capacitors too. Thinking about and calculating capacity. Too little and it would spark anyway. Too much and the windows run without pushing the switch

Best Regards
Martin

 

Thanks. But no

Best Regards
Martin