You mean; it actually melts loose from the connection?
I don't see why not. A badly frayed cable will not have enough copper strands in it to carry the proper current, especially when on a heavy load like starting or, say, if an alternator diode shorts. A very poor connection at a terminal can also get hot enough to melt. A good battery can supply hundreds of amps in a short time, like a spot welder. A shorted started can actually get welded together by a good battery.
The black cable is the negative or ground. The red cable is the hot or positive calbe.
does the car cranking or not at all when it hot? does the car starts ok when it is in cold?
There is a Positive (HOT) & Negative (Ground) battery cable. There are also lots of other HOT wires that are carrying current throughout the vehicle. What exactly are you referring too? hundereds of wires get a book at advance or napa for your car
Electricity passes through the cable. As it passes through the cable, the electricity will encounter resistance. This is what causes an electrical cable to heat up.
The alternator really can be shorted out but you can cause a short if you contact the hot battery connection to ground. whenever you work on a car, you should really disconnect the negative battery cable. It takes that battery out of harms way and you too.
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The negative cable should always be disconnected first so you don't die of and electrical shock or in a bad explosion from hot sparky wires.
assuming that no one has cut a wire, the alternator is probably bad. could be a fuse. Depending on car, it could be a fusible link. Process of elimination. The main large wire on the back of the alternator runs to the battery. Should be smaller wire on the positive cable.
heater control cable not adjusted properly?
Need a new speedometer or speedometer cable.
Negative - (Black) is Ground, Positive + (Red) is Hot. Ground wire goes to Negative (Black) it goes from negative on battery to engine for ground.
If you are refering to the Hot/Cold knob on the inside of the car on the AC/Heater,,,,yes,,, that is the only knob operated by a cable the rest of them are either vacuum or electric