My van has two big batteries as stock from the factory. One is the starter battery and the other is the accessory battery. I presume it has a fairly high output alternator to supply them. The amps, helix DSP and HU are all wired directly to the accessory battery + / -
When the lights and heated seats are on or the cooling fans kick in there's an awful alternator whine.
I'm thinking of getting a Helix 33 Cap which connects directly to the alternator + terminal and then down to the chassis earth.
Has anyone used one? Does it work? Or do you have any other suggestions?
TIA
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