How do I fix the head lights on a 1989 Chevy corvette ?

Question edited for clarity.
Question moved to Corvette sub category.

Removing one of the fuses disconnected the anti theft module.

https://www.google.com/search?q=1989+Chevy+Corvette+reset+security

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Disconnect battery from car, use wrench to remove hold down of link, remove link, install new link, tighten up hold down, reconnect battery.

Are you looking for a wiring diagram or a head light switch with a vacuum diaphragm to operate the light covers or to bring up your lights when you turn them on,like a corvette,if like a corvette,I had a 1971 corvette that didn't open and I used the vacuum parts on the light switch off of a 1968 Pontiac GTO,the light switch was the same as the corvette

Antifreeze in the oil (water in the oil) is classic blown head gasket. Do not drive your car until you have this serious problem fixed by a professional. Continued driving will only worsen the damage already caused by this condition.

Thanks for allowing me to assist you this evening.

on the back of the throttle butterfly is a sensor that controls the amount of fuel and it has carbon paths inside it ands i think this is the one causing your problem ,

CHECK HEAD LIGHT FUSE.

check power to assembly- see if motor runs--if it does, gear must be rebuilt. parts thru Rodney **** follow instructions

More than likely the heater valve is stuck open. You can usually purchase them from the local parts house. As far as the ride most of these cars ride this way. You can update the suspension with newer designs and shocks to allow a softer ride and can even get suspension that is adjustable allowing you to set the ride and performance yourself to your liking. Air suspension is probably also available to allow maximum soft ride.

There is a series of two videos addressing a very similar problem with a 1989 Corvette, first one diagnosis, second one fix. Seems like this is a not unusual problem for these older Corvettes. Check out the links.
Chevy Corvette No Start When Hot The Diagnosis
Chevy Corvette No Start When Hot The Fix

did you try to adjust the dimer switch for dash lights?