Best year for old 2- wheel pickup

If it's the 'no relay' style connections, correct. If it has a horn relay and a good ground to the horn, both sides of the horn will be at ground.

Yup. It's a little harder on the horn switch inside the steering wheel because it's carrying current and will arc a little at the contact points, but it's still 'lifetime' considering that you really don't use the horn that often...

(People in urban areas with 50% ESL or No English At All, and/or No License Or Insurance At All drivers excepted. They just Point and Pray, and you try to stay out of their way.)

When the cars had one little horn that only draws 5 Amps or so, that worked fine, and saved them parts money and lowered the cost of the car. Go to two louder horns, and then the added current overwhelmed the 'no relay' system and they had to switch over.

That's normal, because nobody ever lubes them and the ring is a bear to get at to clean off. Done a few myself.

Silicone spray lubricant, or a graphite and silicone based lock lube like 'Lock Ease'. You need the upper steering column "beauty cover" off to get close, the extension spray tube to get the lube in the right spot, and a small hand inspection mirror to see where you're aiming it, unless you're a contortionist...

You don't want a regular grease there to attract dust and grit out of the air to stick to the ring, that would only make the brush wear worse.

And you want to use silicone lubricants very sparingly and precisely in your life - they get tracked everywhere, last practically forever, are a bear to clean off surfaces (IF you know they are there in the first place), and then you go to paint or glue that surface and the paint fish-eyes and/or the glue doesn't stick... Slop them on everything with reckless abandon, and you /will/ make enemies.

-->--