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  1. 1

    Aux battery for audio

    I think I have an isolator relay that disconnects the aux battery when the ignition is off. I'm going to confirm that tonight. If that's working, I would only have to buy a new aux battery and be done. Then, I hope there is a terminal block for the aux inside the cab (but OK, if not)
  2. 1

    Aux battery for audio

    I checked the wiring diagram for my truck on the gmsquarebody web site. It shows a relay. I'm pretty sure I have the stock setup. I will confirm it tonight. Thanks.
  3. 1

    Aux battery for audio

    I have a 1987 R30 w/454 and TH400. It has the camper special option including a tray for an auxiliary battery. It has the upgraded 94 amp alternator option. I am installing 1100 Watts of audio equipment. I was thinking of installing the auxiliary battery and running the amplifiers off that. But...

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