Dec 6, 2025
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Hi,

I have installed a highbeam ledlight bar (extra lights) and I am going to use the CanM8 so I can use the canLo and CanHigh signals.
My problem is that I can´t find where these two cables are. I searched and what I know is that it should be under the steering wheel (behind the fuses) to the left side.
The car has the steering wheel on the left side. Also found that it should be the T73b conection but I need a picture of where I can find these since it´s cables all over.

If the T73b is wrong (it was those on a VW) please guide me to the correct ones.

Update: I found this connection and if you look at the picture the twined cables measure 2.6-3.6V and 1.4-2.4V The only question is if these are the correct Canbus wires.

For being specific, I have a Seat Leon Cupra st 2019.

Thanks for reading.
 

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Last edited:
There are several CAN Buses in Leon MK3, so my guess is that you want to tap into Comfort (also known as Convenience) CAN Bus.
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It is used in several places - Gateway (obviously), BCM unit, Dashboard, Airbag clock spring, Driver and Passenger door units. You have to choose where you want to tap into wires. I would say that near Airbag clock spring or in loom that goes to the Driver door unit would be the easiest.
 
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