positive terminal smokin hot

I have a 2005 nissan titan.I have noticed the positive terminal gets so hot it melted the protective cover.It gets so hot you cant even touch it.There are no charging issues.

Resistance = Heat. Wire too small, or loose connection at the battery. I can only assume that the problem is at the battery.

All connections are tight,on the titan the post splits,only one side is hot.450 degrees,other side 160

Are you running any aftermarket amps or other added high power consumers? Also your last post seems physically impossible if the two sides are joined, conductivity transfer.

The terminals may be tight, but are they clean? Take both off and rub with steel wool or fine sand/emery paper etc where the terminals contact the battery posts. Note - negative always disconnected when working on the +ve!

yes its a brand new battery.On the post there are two fuseable links,only one is hot.And yes I do have hifonics zeus amp,and a 4 farad cap.It is still hot even when disconected

Obviously that circuit is the problem. If that flink powers the audio & cap, it may be that your cap is faulty, but you'd be better of with a 2nd battery in its place and use a normal automated battery isolator circuit. That's assuming it is a high-power amp and that you have appropriate wiring (eg, the Big-3 etc). Otherwise is your amp on? But that suggests an undersized flink and cabling. But no matter what, assuming all contacts are clean, then as IAAI wrote, the wiring is too small for the load. That means the "distribution" including flnks, terminals, cables etc. So unless there is a fault, you need to fit appropriately side distribution. And the flink or fuse etc should be rated so it normally caries no more than ~70-80% of its rated current. (And the cable shall not be rated lower than the fuse.) Fuses running near there rated current are usually too hot to touch.

X 2 with Oldie, I've been meaning to suggest the same but couldn't express it. Previously both IAAI and myself pointed out out too small a cable and was there an amp? Please don't say yes to this but is the amp permanently on or is it remote switched via the head unit? Mind you if constantly on your flat battery would have told you by now.