The battery ground cable, or ground strap, connects the engine to the chassis, or in some cases, directly to the negative battery terminal. This completes the circuit for electrical devices that are grounded to the engine. When your vehicle doesn’t start and refuses to hold a charge, or your lights flicker or dim, it may be time to replace your battery ground strap. Since these signs can also point to a failing battery, you may need to test your ground.Braid is the conductor of choice where flexibility is required. It is sometimes used for electrically bonding parts of a vehicle, for example an exhaust pipe, door, or hood. At tower sites, braid is good for bonding swinging gates or doors to a ground system - flexibility is a must in such an application. Braid also has some degree of popularity for bonding amateur radio equipment to a common ground buss because of its flexibility. and each strand of the braid weaves in and out, back and forth across the braid. Currents must either follow that inductive weaving path, or "jump" from strand to strand where strands touch. There are of course many individual strands in parallel, so overall inductance should be low. And another question to consider is, with so many points of contact between strands within a length of braid, could there be a potential for noise in a critical RF environment? In braids defense, one should keep in mind that coaxial cables for RF applications have traditionally been made with a braided outer conductor (for its flexibility), and it has worked well. On the other hand, it is interesting to note that high performance, low-loss coaxial cables use a solid outer conductor rather than a braided outer conductor.