Use a digital multimeter and disconnect the negative battery terminal when measuring resistance on a CANbus.
A multimeter, also called volt-ohm-meter ( VOM ),is a handheld measuring instrument either analog or digital that can measure the voltage, resistance, and current across circuits in a device.
When measuring resistance on a CANbus with the digital multimeter, it is necessary to disconnect the negative battery , This puts the power off. This is to ensure only the resistance is measured and prevent other components' from being measured and distorting readings.
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