What does the 12v actually do on the CT22 display?

[okie]

I'm beyond confused about how the ct22 display is supposed to be wired up with the lights and signals. I thought the reason you were supposed to feed the 12v wires into it was so that it would branch that 12v out into the various lights and signals, but I don't seem to be getting 12v out of any of the pins associated with the lights. I'm really confused why you even connect the display to the 12v in the first place if it's not powering any lights. Am I just doing something wrong, or am I just completely misunderstanding how it's supposed to work?

 

[TommyCat]

I look at the indicator led lights on the display as just that… just indicator lights that are wired in parallel with the individual actual lighting positive power when activated or speed setting ground connection when switched on. (Notice the direction of DC flow…) All being on a 12 volt system separate from an e-bikes main battery. (Although there is a led indicator light that is powered with switched main battery power that indicates when the display is enabled.)

No switching or turning on/off of these components is being done at the display that I can see… all done separate from the display. It’s just piggy backing off the 12 volt system to show which components are actuated.


Regards,
T.C.

 

[E-HP]

I look at the indicator led lights on the display as just that… just indicator lights that are wired in parallel with the individual actual lighting positive power when activated or speed setting ground connection when switched on. (Notice the direction of DC flow…) All being on a 12 volt system separate from an e-bikes main battery. (Although there is a led indicator light that is powered with switched main battery power that indicates when the display is enabled.)

No switching or turning on/off of these components is being done at the display that I can see… all done separate from the display. It’s just piggy backing off the 12 volt system to show which components are actuated.


Regards,
T.C.

I provided similar info in the other threads.

I'm not comprehending the CT-22 display wiring on a fundamental level

I'm trying to install a CT-22 display with a SVMC 72150 and QS 205. My understanding going into this was that the display didn't actually control any controller settings, but rather you just ran your wires through its LEDs and it passively showed what mode you were in. But looking at the...

endless-sphere.com

OP, using an analogy, if you're in your car, and you turn on your high beams, your dashboard shows a little blue headlight icon (or whatever your car uses). Your dashboard isn't turning on the high beams. You don't push any buttons on your dashboard. You have a toggle switch that activates the high beams. You'd still have high beams even if the dashboard indicator light is burned out. The display makes it easier for the driver to know his high beams are on, so it's a good feature, but it's only connection to the lighting system is a 12V signal wire going to the dashboard (I know, this is old school; new cars would connect everything to the MCU, and a few harnesses lol). The CT22 is an electronic dashboard, and the indicators work using a 12V signal, just like in your car (you could probably even rig a signal using a sensor on one of the spark plugs, then use it in your car). If you already have a 12V supply on you bike, like for your lights, then great, you barely have to do much work other than running 4 or 5 wires, connected in parallel to the lights' switched 12V input.
As mentioned in the other thread, the 3-speed switch could be complicated (not complex, just using more components than I would bother with, so I'd use high and low).