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mikegt4dude

DI handbrake shared with dash lamp

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Hi

I'm using my handbrake switch as a launch control input and I'm wanting to connect my dashboard lamp back to the switch, should I add two diodes so the lamp power doesn't upset ECU? Or not necessary?

 

Cheers

 

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I assume the switch is to ground so when on the ground is provided to the ECU and to the lamp?

If this is the case the lamp can act as the pullup and the internal Di pullup can be turned off.

 

 

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