Controlled Area Network Board

Using the dual trace feature on the oscilloscope capture the full pattern of the H-CAN and L-CAN. Identify which wire is the H-CAN and which is for the L-CAN 
Blue wire is for H CAN
Yellow wire is for L-CAN
Black wire is earth

On Board CAN system

On your capture also identify were the data pattern start and finishes

with red highlight the data pattern starts and with blue highlight finish.

Right indicator

Lift indicator

Rear Wiper

Stoplights

Fuel pump

Revers light

These pictures are shown patterns which is individual for every load. like right indicator, left indicator, rear wiper, stoplight, fuel pump and revers light.In these picture above the both channels means mirror of each
others.
this board is kind of CAN nod and network, which these node have with I/O circuit and also have CAN contrroler and a line driver which interfaces the CAN L and CAN H different current to the controlling.