Logitech G25 not working

[Ca11um]

Does anybody know what the problem could be? The pedals and all buttons work but the steering doesn't (my shifter is still in the post because I had to buy it separately). I bought this steering wheel second hand and I knew it was "faulty" when I was buying it. I figured it would be an easy fix (I did my research before I agreed to buy it) but apparently not. It is far from it.

I have taken this wheel apart multiple times and I can't see anything wrong with it. I have checked the optical encoder disk and it's all good. I have also checked that the power cable works and there is a solid 24v. I put power straight to the motors using the power cable that I was given with the wheel, and they moved but they moved very slowly. Why is that? The only other thing I can think of is the amperage on the cable? The cable I was given is a 24V 0.75A (18W) cable, but I googled it and apparently the G25 wheel should have a 24V 1.75A (42W) cable. Could this be the reason why it isn't working? Somebody else told me that the low amperage could be the problem but I just wanted more opinions.

 

[super_gt]

Also check the brushes of the electric motors,they might be worn out.

 

[Ca11um]

Also check the brushes of the electric motors,they might be worn out.

I didn't even think about that...But what I'm confused about is if the motors move (even though they only move slowly) with direct power going to them, then why don't they move with the power going through the board? I'm no electrician but I think that the cable either isn't give it enough power/amperage to power everything on the board (including the motors), or there's something wrong with the main circuit board itself. Something that I can't see, because I have checked the board multiple times and there isn't anything visually wrong with it.

Would low amperage cause something to stop working completely? I have a steering wheel for my PC and it doesn't work. It came with a 24V 0.75A (18W) power cable but the official website says that it should have a 24V 1.75A (42W) cable. Could that be the reason why it doesn't work? I'm no electrician but I have taken this wheel apart multiple times and I can't see anything wrong with the internals, so this is the only other thing I can think of. Someone has already told me that the low amperage/wattage could definitely be the problem, but I just wanted some more opinions on it. It is a Logitech G25 wheel (no shifter) if anybody wants to know.

 

[super_gt]

I didn't even think about that...But what I'm confused about is if the motors move (even though they only move slowly) with direct power going to them, then why don't they move with the power going through the board? I'm no electrician but I think that the cable either isn't give it enough power/amperage to power everything on the board (including the motors), or there's something wrong with the main circuit board itself. Something that I can't see, because I have checked the board multiple times and there isn't anything visually wrong with it.

@neema_t knows very well the electronics of this wheel maybe he can help you.
(he will see this message when he visits GTPlanet)

 

[BobK]

Would low amperage cause something to stop working completely?

Yes.

Is the "24V 0.75A" in fact a cable or really a power supply? If power supply, then yes there's your answer right there. If not, it's possible the low current rating means a higher internal resistance so you're not getting either the required voltabge or the required current at the wheel itself.

 

[Ca11um]

Yes.

Is the "24V 0.75A" in fact a cable or really a power supply? If power supply, then yes there's your answer right there. If not, it's possible the low current rating means a higher internal resistance so you're not getting either the required voltabge or the required current at the wheel itself.

My bad, it's a power cable...The original one (24V 1.75A) is supposed to be what people call a "power brick" type, but the one that came with the wheel (24V 0.75A) isn't. It just goes straight from the wall plug to the other end that plugs in to the wheel; it doesn't have a "power brick".

Type of cable it came with: https://goo.gl/images/6ziwxq

Type of cable it should have: https://goo.gl/images/LXA7j2

@neema_t knows very well the electronics of this wheel maybe he can help you.
(he will see this message when he visits GTPlanet)

Thank you. I will wait to see what he says.

 

[daan]

You only need one thread on this issue.

 

[PaulDiRoosta]

What you are referring to as power cables are in fact power supplies. The one you have has the power supply contained within the plug. It will not work until you have a power supply capable of supplying the required power which you say is 42W. If the wheel does not have any other problems then replacing the power supply should get it working. Any power supply that has 24vdc and 1.75 amps or greater will do as the wheel will draw the current it requires but it must be 24vdc.

edit: what you have is more than likely a power supply for a DFGT and once I tried to run my G27 using it and it does not work.

 

[Ca11um]

What you are referring to as power cables are in fact power supplies. The one you have has the power supply contained within the plug. It will not work until you have a power supply capable of supplying the required power which you say is 48W. If the wheel does not have any other problems then replacing the power supply should get it working. Any power supply that has 24vdc and 1.75 amps or greater will do as the wheel will draw the current it requires but it must be 24vdc.

edit: what you have is more than likely a power supply for a DFGT and once I tried to run my G27 using it and it does not work.

Thank you. I've always called them power cables (don't really know the difference), but obviously you know more than me lol. I was getting confused because I have done a lot of research in to this (I would like to get it working so I can use it) and some people have said that the power supply I have (24V 0.75A) will work with the G25 and the G27. But it doesn't...Or at least mine doesn't, unless my power supply isn't the problem. But like I said, I have taken my wheel apart 3/4 times and I have looked over everything very carefully, but I can't see anything else wrong with it. Can't see any damage on the main circuit board, the optical encoder is all good, I put power straight to the motors and they move. And obviously the circuit board is working or at least part of it is, because all the buttons work (they run off the USB); it's just not picking up any sterring wheel movement and there's no FFB at the moment which is making me think that it is the power supply which is the problem.

 

[BobK]

If the device requires 1.75A and the supply you're using can only supply 0.75A then it isn't going to work properly. Doesn't matter how many people say otherwise; your own experience is showing you it doesn't work.

 

[sesselpupser]

Could this be the reason why it isn't working? Somebody else told me that the low amperage could be the problem but I just wanted more opinions.

It's definitely one of the reasons, possibly the reason but there could be other things wrong with it. Start by getting the correct power supply and see how it goes.

 

[Ca11um]

If the device requires 1.75A and the supply you're using can only supply 0.75A then it isn't going to work properly. Doesn't matter how many people say otherwise; your own experience is showing you it doesn't work.

That's true, but at the time I was trying to rule things out and narrow it down to what the problem could be. Before I even bought the steering wheel I thought it would have been the power supply (I did a little bit of research); I thought it was going to be an easy fix. Other people who have this problem have faulty power supplies that aren't creating the correct amount of voltage, however mine is which is why I started looking at internal parts. After taking it apart a few times, that's when I noticed the amperage on my power supply, and a few people said it would work with the G25 wheel, but the official Logitech website says that it needs more amperage so I have gone back to the power supply being the problem lol

It's definitely one of the reasons, possibly the reason but there could be other things wrong with it. Start by getting the correct power supply and see how it goes.

Yes, that would be a good starting point. I have already ordered another power supply but I am still waiting for it to arrive...I couldn't find an original Logitech one so I had to get a 3rd party one, but it is 24V 3A so that should work. If the wheel doesn't work with the new power supply then I have no idea what to do next.

 

[sesselpupser]

Yes, that would be a good starting point. I have already ordered another power supply but I am still waiting for it to arrive...I couldn't find an original Logitech one so I had to get a 3rd party one, but it is 24V 3A so that should work. If the wheel doesn't work with the new power supply then I have no idea what to do next.

As long as the plug on the end is the right size and the polarity is the same it'll be fine, you can check the polarity by looking at this symbol:

This means the centre of the DC jack is positive while the outside of the tip is negative, if the + and - on your new supply is the other way around you can cut and strip the cable and use a terminal block to rejoin them with the conductors swapped over.

 

[Ca11um]

As long as the plug on the end is the right size and the polarity is the same it'll be fine, you can check the polarity by looking at this symbol:

This means the centre of the DC jack is positive while the outside of the tip is negative, if the + and - on your new supply is the other way around you can cut and strip the cable and use a terminal block to rejoin them with the conductors swapped over.

Yes, I know positive should be in the middle...The new power supply I bought says that it works with a G25 wheel so it should be correct, but I will double check it before I plug it in.

 

[Rallyace1]

Hi there just came across this thread and website. I have the G25 setup and it hasn’t been used for a few years. I thought I had it all stored away but when plugging all in I don’t seem to have a power supply. Did you get sorted & has it worked for you? Also, none of my buttons are working when usb is plugged into PS3- would this be down to no power supply or should they work without? I have a green “shifter” light and the power light is very faint?

 

[PocketZeven]

Hi there just came across this thread and website. I have the G25 setup and it hasn’t been used for a few years. I thought I had it all stored away but when plugging all in I don’t seem to have a power supply. Did you get sorted & has it worked for you? Also, none of my buttons are working when usb is plugged into PS3- would this be down to no power supply or should they work without? I have a green “shifter” light and the power light is very faint?

Do you mean you dont have a power supply? Or do you mean you dont have power?

 

[Rallyace1]

I don’t have a power supply, like the image. I need to order one I guess. I plugged the usb into my laptop and checked the software - all is working fine so hopefully the power supply will sort the problem. It’s so long since I used it I forgot it should have power supply but I have mislaid it. Thanks

 

[PocketZeven]

I don’t have a power supply, like the image. I need to order one I guess. I plugged the usb into my laptop and checked the software - all is working fine so hopefully the power supply will sort the problem. It’s so long since I used it I forgot it should have power supply but I have mislaid it. Thanks

There are lots on ebay. Good Luck!