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Step 4Making a cable to connect the -ve VSR input to the chassis earth of the van
You need to make up a cable to connect the -ve input of the VSR to the van chassis.
This cable has nothing to do with completing the charging circuit between the two batteries. It is used to provide power to the VSR to activate the relay and to act as the reference so it can measure the voltage seen across the starter battery.
This means we don't need a piece of high current cable. I don't actually know the rating of this cable, it was a piece left behind after a fitter had installed a new alarm for me.
This cable has nothing to do with completing the charging circuit between the two batteries. It is used to provide power to the VSR to activate the relay and to act as the reference so it can measure the voltage seen across the starter battery.
This means we don't need a piece of high current cable. I don't actually know the rating of this cable, it was a piece left behind after a fitter had installed a new alarm for me.
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