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  1. Spruce

    Issues with the 12v head unit supply

    Used a piggyback and everything is just as it should be. I snipped and taped the existing 12v so hopefully nothing bad comes of it. I don't think it deserves its' own thread, but does anyone know the firewall grommet size? I ran a power line for a sub that I'd like to install and noticed...
  2. Spruce

    Issues with the 12v head unit supply

    Thanks guys. I took the dash apart as far as I wanted to yesterday and saw absolutely no evidence of wire corrosion or fraying. The battery is pulling 12.4 with the engine off and around 14.8 with the engine on. The dome fuse in the box is pulling 0.0 (obviously) with the key off and around...
  3. Spruce

    Issues with the 12v head unit supply

    The radio has worked in the brief times that my vehicle has supplied it with 12v, so yeah I think so. The issue is that I'm seeing the toggle in voltage and it's so random I have no idea where to start. I ordered some piggy-back fuses that I've used in the past and like, but this is a truck...
  4. Spruce

    Issues with the 12v head unit supply

    1994 fjz- I'm waiting for parts to come in to do the knuckle rebuild and I decided to update the tape deck head unit in the truck. When I pulled the dash I noticed that one of the previous owners had removed the factory wiring harness....lovely. I couldn't find one at the scrap yard, so I...
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