Electrical question: Does this look right

[Brtuffli]

78sc. Positive battery cable and s a bit warm.

[old man neri]

It could have been caused by the really dirty state of the connections. Hard to tell until you take it apart and inspect/clean it. But yes, it looks like something got warm.

[dad911]

Clean it up and replace rusty and pitted parts. Current through resistance = heat (and voltage drop) P=R x I^2 (power loss (heat) = Resistance times current squared.)

[Bob Kontak]

Originally Posted by dad911

Clean it up and replace rusty and pitted parts. Current through resistance = heat (and voltage drop) P=R x I^2 (power loss (heat) = Resistance times current squared.)

Whatever dad911 says if you understand it.

What I would do it clean up and replace rusty and pitted parts.

I believe that goes back to the starter. Check connection there and make sure your ground to body from battery is robust.

[McLaren-TAG]

Is that red wire leading off to the relay kit fused? It seems like it's taken the worst of it and unfused connection will draw a lot of current and overheat whereas the fuse would have simply popped.

Clean it up and follow the wires to make sure nothing else is overheated and burned the insulation off.

[Jonny H]

Undo those ring crimps and clean back to shiny metal. The red and black wire 'additions' look too far gone. Cut back to shiny wire and recrimp. Replace the rusty clamp bolt too.

If the red wire is the feed for a the headlight relay kit, it should still be fused by the original headlamp fuses. That's if it is wired correctly of course.

[emac]

And why is your Positive Cable Black?

Ernie

[Norm01]

At least one of those looks like it’s soldered into the lug which can burn the wire insulator.

[Jonny H]

Originally Posted by emac

And why is your Positive Cable Black?

Ernie

Cable to starter is black even thought it's positive.

[dad911]

Sorry Bob. You're right. A little cryptic......rushed reply.

Any corrosion in an electrical connection causes a voltage drop when current flows through it. More corrosion is more heat/larger voltage drop, until it fails.

New bolt and perhaps some new ring terminals are in order.

[3rd_gear_Ted]

Get yourself an covered auxiliary terminal strip that will accommodate the wire lugs and mount it somewhere nearby.
The unfused leads need to have some inline fuses terminated to the terminal strip also for proper protection.
Get some red tape and wrap that big black cable; WTF