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Operating Voltage

mrsr32

By mrsr32,
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mrsr32 Rising Star

mrsr32

Posted
Posted

Hi

I've just installed an Apexi RSM, this uses the ign power wire from the ecu as its source.

The voltage reported on the RSM with the fan on 1 and headlights on, can drop down to around 12.4v and at idle around 11.8v.

Is my alternator on the way out? What should the operating voltage be? around 13.8v?

Going to get the multimeter out to check voltage at the battery tonight.

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Duncan Grand Master

Duncan

Posted
Posted

Either alternator, battery or just wiring to the RSM (including bad earth, dont just thing about positive side). Yes around 14v depending on how cold the car is, and yes a multimeter at the battery when stopped (~12v) and running (~14v) is the next step

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