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Thread: GLHS ground wire upgrade

  1. #1
    Hybrid booster
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    Question GLHS ground wire upgrade

    Hello. I just repaired my firewall to fuelrail ground strap today after having some odd driveability problems and noticing it had broken--

    Anyway, FWD sells an upgrade kit made of stinger wire--has anyone here purchased that kit, and where/how does it install?

    Looking under the hood I'm seeing the (-) from the battery landed to the block and firewall, the firewall strap I just mentioned, and the one that jumps the PS motor mount. ?

    Any info on this would be great, thanks!

  2. #2
    Supporting Member Turbo Mopar Contributor supercrackerbox's Avatar
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    Re: GLHS ground wire upgrade

    I have not personally tried the ones FWDP sells, but I made my own for my Charger using the same wire, soldered lugs for the ends, and quality heat shrink tubing. They've held up for over a decade now, and of all the problems the car has given me, electrical gremlins is not one of them.

    Now my Daytona is a different story . . .

  3. #3
    Supporting Member II Turbo Mopar Contributor minigts's Avatar
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    Re: GLHS ground wire upgrade

    I have a set and haven't had any issues. I don't think I used every one of them, but they are nice quality for sure.


    Jon Trotter

    1985 Dodge Shelby Charger, Currently decommissioned
    1987 Shelby GLHS, #937
    1987 Shelby Lancer, #628

    Quote Originally Posted by Reeves View Post
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  4. #4
    Hybrid booster
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    Re: GLHS ground wire upgrade

    Which wires did you guys replace? The one on the PS firewall is obviously an important one. The only others I'm aware of are the ones on the PS motor mount, which has clips, and the two leads that come off of the negative battery terminal/post.

  5. #5
    Supporting Member II Turbo Mopar Contributor minigts's Avatar
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    Re: GLHS ground wire upgrade

    I only did the fuel rail and one from the alternator. I probably should do one from the side motor mount since I have the cable.


    Jon Trotter

    1985 Dodge Shelby Charger, Currently decommissioned
    1987 Shelby GLHS, #937
    1987 Shelby Lancer, #628

    Quote Originally Posted by Reeves View Post
    I can be ready. Please send pics of wife.
    _____DodgeZ add comments here______

  6. #6
    turbo addict iTurbo's Avatar
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    Re: GLHS ground wire upgrade

    I have the FWDP ground kit installed on two cars (SL and GLH Turbo) and they installed and work great. The Stinger wire is very flexible which is nice for routing.

  7. #7
    Hybrid booster
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    Re: GLHS ground wire upgrade

    What wires came in the kit for your car, and did you have to do any mods to attach them, or were they all plug-play?

    I've asked FWD about this, no reply. I have an oddball wire on my passenger side motor mount that has clips on it versus ring terminals.

  8. #8
    Supporting Member Turbo Mopar Contributor supercrackerbox's Avatar
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    Re: GLHS ground wire upgrade

    Another one I like to do is from the body of the alternator to the engine block, as the alternator itself is isolated by rubber bushings.

  9. #9
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: GLHS ground wire upgrade

    Quote Originally Posted by supercrackerbox View Post
    Another one I like to do is from the body of the alternator to the engine block, as the alternator itself is isolated by rubber bushings.
    Isn't that where the large ground on the head on the driver's side comes from. I know it goes from there to the -bat terminal, but I believe it starts at the alt.?

  10. #10
    Garrett booster
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    Re: GLHS ground wire upgrade

    Quote Originally Posted by cordes View Post
    Isn't that where the large ground on the head on the driver's side comes from. I know it goes from there to the -bat terminal, but I believe it starts at the alt.?
    Yes, you are correct, The alternator ground wire is spliced in to the engine ground wire which connects to the negative side of the battery terminal.

  11. #11
    turbo addict iTurbo's Avatar
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    Re: GLHS ground wire upgrade

    The FWDP ground wire kit contains four wires.

    One from the negative battery terminal to the driver side inner fender just behind battery.
    Another from the driver side inner fender to the driver side of the cylinder head.
    Another from the driver side of the cylinder head to the alternator case.
    Then another from the firewall to the fuel rail hold down bolt.

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