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Thread: Blown amp???

  1. #1
    Join Date
    Nov 2016
    Location
    Livingston, Tx.
    Posts
    46

    Default Blown amp???

    After reworking batteries and amps https://forum.supraboats.com/showthr...-amp-Amps-redo the engine wouldn't crank on battery 2 (house). I assumed it was because I had a 4ga cable between battery grounds. I added an additional 4ga cable (because I had one) between the grounds and that fixed the starting on battery 2 issue. But after adding the cable my JL 800/8 amp won't power up. I have 12.6 volts at the power in and remote wires at the amp and my 500/1 sub amp comes up fine, fuses are good. Do amps blow when not in use? The only thing done was to disconnect ground cables from battery and then reconnect. It was working fine before, but not after. The amp is a year and 3 months old, out of warranty.
    03 Launch 22V
    3) 800lb sacks, Perfect Pass
    Fusion head, JL amps, Wet Sounds Interior/Tower Speakers, 10" Sub
    "Anyone have a stainless steel magnet?"

  2. #2
    Join Date
    Apr 2012
    Location
    Lake Wylie NC Area
    Posts
    440

    Default

    I have 12.6 volts at the power in and remote wires at the amp
    When taking this reading, to where is the volt meter ground lead connected?
    Michael
    Mikes Liquid Audio

  3. #3
    Join Date
    Nov 2016
    Location
    Livingston, Tx.
    Posts
    46

    Default

    Fixed it! Please, don't even ask.

  4. #4
    Join Date
    Nov 2016
    Location
    Livingston, Tx.
    Posts
    46

    Default

    You were all over it Wylietunes, I was testing using direct to battery ground. My dedicated amp ground cable wasn't connected.

  5. #5
    Join Date
    Sep 2004
    Location
    Hudson, WI
    Posts
    2,651

    Default

    Quote Originally Posted by Stillski View Post
    My dedicated amp ground cable wasn't connected.
    Glad it was something easy!!
    Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.

  6. #6
    Join Date
    Apr 2012
    Location
    Lake Wylie NC Area
    Posts
    440

    Default

    Thats why I framed the question like I did. Had a feeling your meter ground reference was not the amp terminal. Glad you found it. its amazing how many calls I field this time of year with batteries going beck in or being replaced, a rogue cable gets MIA and something doesnt power up.
    Michael
    Mikes Liquid Audio

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