alright i need to find out if the headlight wiring harness from the firewall out to the module/relay and lights is a separately removable harness and not tied into anything else

and also if you swap this harness under the hood from an 86 older one to an 87-up one if you also have to swap the harness inside the car too ?

who has converted from three wire system to two wire system

and was it worth, and would you do it again if you had to ?

trying to make up my mind if i want to replace my broken 82 motors with 82-86 ones, or upgrade to 87-up system

no opinionated info wanted,

only truthful and factual info please thanks

this just tends to be one of these subjects that everyone seems to have a different answer to