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Ground after battery relocation to trunk

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Hi,

Im building a complete new power wiring for the car and also moving battery to the trunk.

Should i ground the battery to chassis only at the trunk or should i connect to plenum/block as well ? (dashed blue line in my diagram)

Thanks,

Paulo

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Ground the battery to the chassis close to the battery location. In the engine bay make sure you have a good, short grounding cable from the block to the chassis.

Yes, i did that, but I need to know if I should also have a cable from battery (-) to engine block as well

As long as the vehicle chassis is metal you will not need an additional battery to engine block cable.