Introdução

Bad grounds on the W123 can cause all sorts of issues, from hard starts, to erratic function of electrical components. One way to help reduce this issue is to replace the ground strap on your battery with a new one, and perhaps even one that is larger than the one from the factory.

Ferramentas

Peças

  1. Start by disconnecting both battery terminals, beginning with the negative (-) side, which travels just a few inches to a bolt attaching the other end to the car's body.
    • Start by disconnecting both battery terminals, beginning with the negative (-) side, which travels just a few inches to a bolt attaching the other end to the car's body.

    • Never remove your positive (+) cable first or you risk injury from electric shock.

    Adicionar comentário

  2. Loosen and remove this 13mm bolt that holds the cable to the metal of the car's chassis.
    • Loosen and remove this 13mm bolt that holds the cable to the metal of the car's chassis.

    • Now remove the old ground cable.

    Adicionar comentário

  3. Spread Fixmas Cheer
    Get $12 off your purchase of $50 or more with code FIXMAS12
    Spread Fixmas Cheer
    Get $12 off your purchase of $50 or more with code FIXMAS12
    • You can see here that the new ground cable is substantially thicker. It is a 2 gage cable. The ends are also crimped better, protecting the inner wire from corrosion.

    • This cable is also a bit longer than the old one, giving some more wiggle room.

    Adicionar comentário

    • Install the new ground cable, using the new captive bolt, and nut, that came with it.

    after replacing this ground cable my tach started working again! I can’t say enough about cleaning grounds and contacts/connections in general.  A cheap and easy way to solve some common electrical issues

    Bob - Responder

    I would recommend using a small brass brush to clean the area on the chassis where the bolt makes contact. Having a clean ground will help in so many ways to eliminate electrical gremlins.

    Andrew Lisenby - Responder

Conclusão

Once you've finished, consider covering the terminal where the cable attaches to the battery in a silicone dielectric grease to prevent corrosion.

9 outras pessoas concluíram este guia.

Nicolas Siemsen

Member since: 06-12-2013

29.514 reputação

79 Guides authored

Equipe

Master Techs Membro de Master Techs

Community

279 Membros

758 Guides authored

Adicionar comentário

Visualizar Estatísticas:

Últimas 24 horas: 3

Últimos 7 dias: 10

Últimos 30 dias: 69

Todo: 5,075