C400GT underseat light

[Shah954]

Hi all

Picked up a new to me 2019 c400gt couple of days ago. Am in South Wales UK. One issue I got tho is the underneath light doesn't come on. Is there a setting? Had a look at parts diagram and can't even locate the led light itself...any help appreciated. Thanks

 

[wspollack]

Hi all

Picked up a new to me 2019 c400gt couple of days ago. Am in South Wales UK. One issue I got tho is the underneath light doesn't come on. Is there a setting? Had a look at parts diagram and can't even locate the led light itself...any help appreciated. Thanks

The underseat light doesn't have a separate switch. (And that may be a good thing, because the 650 Burgman scooters had one, and a common problem was folks' forgetting to turn it off, draining the battery.)

Instead, it's controlled by the ignition button:



You don't have to actually start the bike. Just press the main button (with the fob nearby, of course), the one that lights up the dash. The "short time," by the way, is 60 seconds, i.e., the light will stay lit for a minute after you press the main button again (turning off the dash). You don't have to start the actual combustion-running of the engine -- just press that button.

I don't believe the light goes off when the seat is fully closed (i.e., before the minute's up), but I'd have to leave a camera running inside the storage compartment. This is sort of like verifying that the light inside a refrigerator goes off when you close the door.

The LED itself is located toward the front of the seat, i.e., near the hinge:



All of this is relevant to the latest model years, but I don't believe any of this is different on your MY '19 version.

I hope this the info you were looking for.

 

[Shah954]

Thanks for this. Appreciated

I think on my19 the light is fitted in the plastic trim in the storage compartment rather then on the bottom of the seat. I took a pic off eBay with the same part and you can see it there attached.

I don't believe the led would have failed on a 4 year old bike. Is the led linked to the latch for it to turn on? Might have to check the connections.

 

[wspollack]

Thanks for this. Appreciated

I think on my19 the light is fitted in the plastic trim in the storage compartment rather then on the bottom of the seat. I took a pic off eBay with the same part and you can see it there attached.

I don't believe the led would have failed on a 4 year old bike. Is the led linked to the latch for it to turn on? Might have to check the connections.

As it turns out, at some point since your MY19 things certainly have changed, with respect to that light. I had occasion today to remove the washtub, er, underseat storage compartment (in the course of doing some electrical farkles). Here's a screen grab from the shop manual:



The reason I mention this is because on my MY23 C 400 GT, that luggage-compartment-light disconnection was not necessary. If you look carefully at the photo I put up in post #2, all the way over on the lower left of that pic you can see the wire that powers the underseat light ... which, as you noted, is now located on the seat platform itself, not on the side of the washtub. (So it wasn't necessary for me to disconnect anything for the light, but I did have to slide down that cable holder gizmo.)

I did this same removal about a year and a half ago on my MY22, and I don't remember which location that used, or whether I had to disconnect a switch. (And I bought the shop manual around that time, so it certainly wouldn't cover any changes made to, say, MY23 bikes.)

In any case, then, yep, there's some kind of connector you may want to check, to see if it's, uh, connected. Looks like it's over on the left (rear-brake) side of the bike.

Oh, and as always, be careful if you take out the washtub even a little bit, not to bang (or break) the little switch in the back of it, the one that lets the bike know whether the flex case is deployed or not. I did that on my first C 400 GT, and regretted it.

 

[Shah954]

Thank you for that. Just returned form my travels so will have a look when I get to it. Hard to believe the led would have blown so much better something else

 

[Shah954]

As it turns out, at some point since your MY19 things certainly have changed, with respect to that light. I had occasion today to remove the washtub, er, underseat storage compartment (in the course of doing some electrical farkles). Here's a screen grab from the shop manual:

View attachment 4406

The reason I mention this is because on my MY23 C 400 GT, that luggage-compartment-light disconnection was not necessary. If you look carefully at the photo I put up in post #2, all the way over on the lower left of that pic you can see the wire that powers the underseat light ... which, as you noted, is now located on the seat platform itself, not on the side of the washtub. (So it wasn't necessary for me to disconnect anything for the light, but I did have to slide down that cable holder gizmo.)

I did this same removal about a year and a half ago on my MY22, and I don't remember which location that used, or whether I had to disconnect a switch. (And I bought the shop manual around that time, so it certainly wouldn't cover any changes made to, say, MY23 bikes.)

In any case, then, yep, there's some kind of connector you may want to check, to see if it's, uh, connected. Looks like it's over on the left (rear-brake) side of the bike.

Oh, and as always, be careful if you take out the washtub even a little bit, not to bang (or break) the little switch in the back of it, the one that lets the bike know whether the flex case is deployed or not. I did that on my first C 400 GT, and regretted it.

Spot on. Removed the washtub to install my shad box mount, and as expected, it was unplugged. Plugged in and I now have light! Thank you