Forum » EFI Wiring Fundamentals » Not sure this belongs here, but pull up resistors

Not sure this belongs here, but pull up resistors

EFI Wiring Fundamentals

Discussion and questions related to the course EFI Wiring Fundamentals


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So I'm looking to bring the idiot lights (low coolant, seatbelt, high beam and blinkers) from the factory wiring into my ADU 7 digital dash. These seem to be mostly switch to ground signals to activate. Do I need to enable the pull up resistors in the Ecumaster dash to get these to work correctly? Thanks

Im not sure how the coolant light works but most commonly the indicators and high beam would be +12V signals when on so they will not need a pull-up.

Ok, Thanks Adam. For the other warning lights that switch to ground when activated, I would need a pull up though, correct?

For switch to ground to be detected, you will need a pull-up resistor enabled.