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    Jeep Grand Cherokee Head Unit Ground

    I'm looking to upgrade my system. The Grand Cherokee doesn't have a ground wire in the factory harness, and I wanted to know if any one could recommend a good spot near the HU location to ground it?







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    Re: Jeep Grand Cherokee Head Unit Ground

    i ended up going underneath the drivers dash...couldnt find anything good in there



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    Re: Jeep Grand Cherokee Head Unit Ground

    What year do you have? IIRC mine had one in there, a separate black wire from the main harness. Works fine for me.



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    Re: Jeep Grand Cherokee Head Unit Ground

    I ran my ground to a factory ground in the fuse box in the passenger side kick panel. That works well for me. I have a 97 FYI.



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    Re: Jeep Grand Cherokee Head Unit Ground

    My 01 had one with like the clip thing. And IIRC my 97 had one too? I know I didnt need to run it anywhere special.



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    Re: Jeep Grand Cherokee Head Unit Ground

    Quote Originally Posted by -01limited- View Post
    My 01 had one with like the clip thing. And IIRC my 97 had one too? I know I didnt need to run it anywhere special.
    Yup. I take back my last post. I have something else grounded there. Dammit, now I have to think of what it is. Anyway, I have a VIC which had the time on it controlled by the factory radio. There was a clip that was attached to the back of my factory radio. It had 2 wires. I'm pretty sure one of them was to send a signal for the clock on the VIC and the other was to ground the radio. I clipped the connector off of that and grounded it to the factory ground. Now, WTF did I ground in the fuse box? Maybe I'm just imagining grounding something in there...



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    Re: Jeep Grand Cherokee Head Unit Ground

    Nope. I grounded the PAC SWI-JACK there. Now I remember!



    94 Caprice Classic LS: DEH-P800PRS, TS-C720PRS, MRV-F545, MRD-M1005, 2 Fi X 12s in 2.5 net cubes sealed; 97 Grand Cherokee TSi: CDA-9855, TS-D1720C, MRV-F345, MRD-M605, SWX-1043D in .54 net cubes sealed




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    Re: Jeep Grand Cherokee Head Unit Ground

    I have a '00 Grand Cherokee. I'm getting a receiver that you can add GPS to. The GPS unit has a separate ground, and then I have a E-Brake bypass that also has a ground wire. Could I tie all of them together into that ground wire or should I try to find someplace else for those? Thanks for your help.




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    Re: Jeep Grand Cherokee Head Unit Ground

    You can definitely tie them all together, but I'd probably find another spot other than the factory ground for them if you do that. The factory ground is a rather small ground that's probably tied in somewhere with a bunch of other grounds. Come to think of it, it's probably why I had alternator whine and why my headlights used to introduce noise into my system until I got my ground loop isolator. Luckily, I didn't lose any audible sound quality by adding it.



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    Re: Jeep Grand Cherokee Head Unit Ground

    Quote Originally Posted by plugitin View Post
    i ended up going underneath the drivers dash...couldnt find anything good in there
    Do you remember where under the dash you connected it? I have a Kenwood amp that is grounded under the back seat, if I ran a ground wire from there to behind my head unit would that work? Some of the posts I've read say you shouldn't have a long ground wire.




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    Re: Jeep Grand Cherokee Head Unit Ground

    A long ground wire can introduce some hiss or noise into your system. If you run a long ground wire and don't hear any noise, I'd say you're fine. If you run a long wire and get some noise, shorten it up a little and that should help. I'd recommend trying to find somewhere in the dash. I know the dash on my 97 is fairly easy to disassemble. I'd imagine yours should be as well.



    94 Caprice Classic LS: DEH-P800PRS, TS-C720PRS, MRV-F545, MRD-M1005, 2 Fi X 12s in 2.5 net cubes sealed; 97 Grand Cherokee TSi: CDA-9855, TS-D1720C, MRV-F345, MRD-M605, SWX-1043D in .54 net cubes sealed




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    Re: Jeep Grand Cherokee Head Unit Ground

    Thanks ej for all the help, and sorry for all the ?'s. I have one more. How can I tell a good grounding spot from a bad one?




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    Re: Jeep Grand Cherokee Head Unit Ground

    Bare metal is best. I'd imagine with the Jeep being unibody, almost any bare metal will be a "chassis" ground in a sense.



    94 Caprice Classic LS: DEH-P800PRS, TS-C720PRS, MRV-F545, MRD-M1005, 2 Fi X 12s in 2.5 net cubes sealed; 97 Grand Cherokee TSi: CDA-9855, TS-D1720C, MRV-F345, MRD-M605, SWX-1043D in .54 net cubes sealed




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    Re: Jeep Grand Cherokee Head Unit Ground

    Quote Originally Posted by TJ Smith View Post
    Do you remember where under the dash you connected it? I have a Kenwood amp that is grounded under the back seat, if I ran a ground wire from there to behind my head unit would that work? Some of the posts I've read say you shouldn't have a long ground wire.
    They dont have to be grounded together. I just grounded it on the drivers side, to one of the steering column nuts/stud i think.



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