Measuring resistance from 7 to 8 will provide difficult to interpret results. The best way to check the AFM slider is to put battery voltage across 9 to 6 (positive on 9, negative on 6), and then measure the voltage between 7 and 8 while you move the wiper around. This process is documented on page EE-13 of the 77 FSM)

The AFM is Dr. Bosch black magic and voodoo.

As for the dent in the wiper? I don't know what you mean. Can you circle what you're talking about on your pic?

Repairing a fuel injected car can be a pain in th A*se..😭

I would before doing anything to all the sensors in the system advice to FIRST do a compression test on the engine so you KNOW that the engine is mechanicaly in good order! Very important as with the electronics on these cars many things can go wrong. (Buy a good compression meter not expensive.)

Then also check every vacuum line and all the rubber hoses in the inlet system.. a small leak will throw the systems ECCS* (NOT A ECU, how many times do i have to say this... sorry.. anyhow..) the ECCS* get complete faulty readings when there is a air leak even a smallest one will ruin how the engine will run.

Also, Cleaning the electric contact with a good contactcleaner, like they use in boating is a good one look it up!

Cleaning contacts can be a temporary thing when you do it with a nail file, i would be very careful with those.. (At first the contacts will work but later on they will fail if they were silver or gold contacts.)

A lot of contacts have golden or silver contact points.. Golden contacts should really be cleaned with contact cleaner (or alcohol) as also silver contacts (But not necessarily on silver) @Yarb ) Copper contacts can be cleaned up with a small (nail) file without a problem.)

As a (ex) electronics guy i also know in audio there were a LOT of silver contacts and.. not many people i think know this:

Oxidized silver conducts electricity even better than silver itself! Really! So cleaning the silver-plated contacts is completely unnecessary and harmful, because you're making the silver layer even thinner.

Again, the conductivity of rusted (black!) silver is BETTER than of silver itself!

Further, as we all know gold does not rust so that is not a problem, clean it with alcohol and a cotton swab.

ECCS is what Nissan called the computer for the ZX's. The 280Z's used an ECU. He has a 1978 280Z.

At best you could correct people for adding the E. Electronic or electrical control unit.

I think he's talking about the bend in the wiper arm.