What makes the wire so hot to the touch coming from alternator to the battery with lights on and air conditioning. It is also hot with one of the items off. I check all the wires they were good. Even behind fuse box all the way to the firewall and the other side. Please help, thank you.
Keywords:K10
Resistance in the circuit creates heat. This can be in the form of corrosion at the battery. Corrosion in the wiring or cables. Rust. Poor or loose connections. Too small of wire. Damaged or broken wiring.
What happens is the amperage draw increases(when you turn on extras) and the wiring can not handle the the amount drawn across it.
How to check resistance with a Ohmmeter
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