They're called temporary or emergency battery cable ends. In my opinion they also cause far more problems than they solve. These devices have been widely used over the years and today we see quite a few problems.

Vehicles today are extremely sensitive to voltage, due to the high number of computers that are used. Poor connections, like the one in the photo, can easily drop system voltage by two volts. While this may not seem that great, two volts represents over 16% loss of current in a 12 volt system. Computer problems can occur with less the half that drop.

ABS lights, SIR lights and check engine lights are a few possibilities. Beyond being an annoyance a great deal of damage can also be done. For instance in the above example the engine ground could no longer conduct the proper amperage. When this occurs, current being used in the system must find another route back to the battery. This is called a transient ground. In some cases an improperly grounded engine can result in current flow through the coolant. Repeated radiator and heater core failures can quickly result.

In the case above, the transmission was severely damaged. Insufficient ground caused current drawn by the starter to flow through the transmission components. The resulting damage was several thousand dollars.

AGCO can properly repair your cables if need be. With our equipment, a new end can be crimped and sealed to the cable, like the factory joint. Such a repair can save a huge amount in unnecessary damage. Never take chances, have us properly repair your battery harness.