My 1993 mercury capri wont start im not very inclined when it comes to any sort of vehicle i dont know if its battery alternator or somethimng else when i try to start it just clicks repeatedly

It's best to relate symptoms to narrow things down. I assume you are still getting a dead battery when trying to start even after replacing the alternator and battery.
Get a volt meter. Harbor freight sells them ridiculously cheap (about $5). Measure the voltage at the battery terminals when the engine is running. If it is at least 13.5 volts to 15 volts then the alternator is charging correctly. If it is 12 volts then the alternator is not charging the battery.

If the alternator checks out ok, then check for things that could be draining the battery when the car is off. Usual suspect is the trunk light. Put your cell phone on video record into the trunk facing the light, then shut the trunk. If the light stays on, its because the switch in the latch mechanism is faulty. WD40 might make it work, or just pull the bulb. Also, check the glove box light the same way. Good luck...Chris

Whom ever did the parts replacement, didn't know
how to do any proper testing to resolve

Find a repair shop that can

You need a new regulator, or you have a bad ground to your battery.

If the idle speed is irratic...consider changing the dle air control valve...could also be map sensor or throttle position sensor....any check engine lights??

Could you please explain in further detail what is the L wire you're referring to?

Capri rotor replacement is only done by a mechanically inclined person with tools. The rotors have the front bearings pressed in, so the rotor must be removed from the axle. Bearings must be pressed in, and preload must be adjusted for the new rotor. If you do not understand any of this then find a mechanic. Expect to pay at least $150 per rotor replacement.

An alternative is if you can find a junk yard Capri with decent rotors, then it can be installed onto your vehicle without the need for a mechanic to do bearing replacement. Keep in mind though that the junk yard Capri may have bad bearings...Good luck...Chris

Most after market replacement alternators have the wrong pulley installed...the shafts are different sizes, so you cannot even use your old pulley. Best is to have the original alternator rebuilt. Alternative is to use a heavy duty industrial belt, like a Gates...not a perfect solution, but it will help...good luck...Chris

you might be tightening it too tight or you have a burr on one of your pullies

that pully could be your problem take your unit to the part store have then pull a unit an match the pullys

its the alternator pulley thats defective and in order to pull the alternator you a have to take off the piece with the hoses on it above the alternator and you can wiggle it out