You will NOT find a separate reservoir.
To add hydraulic fluid, you'll need to:
1. Locate the hydraulic pump: This is usually part of the convertible top mechanism itself, often near the pump motor. It might be under a panel or cover in the trunk or under the car near the top mechanism. Consult your owner's manual (if you have one) for the exact location.
2. Identify the fill point: The pump itself will have a fitting, often a small cap or plug. It might be labelled. Again, your owner's manual is key here.
3. Use the correct fluid: Use the type of hydraulic fluid specified in your owner's manual. It's usually a specific type of ATF (Automatic Transmission Fluid) but not all ATF is the same. Get the correct fluid to avoid damaging the system.
4. Add fluid slowly: Add small amounts of fluid at a time, checking the level. You likely won't need much.
Caution: If your convertible top isn't working properly, adding fluid might not fix the problem. There could be a leak in the system, a problem with the pump, or other mechanical issues. Adding fluid to a leaking system won't solve the underlying problem. You may need to consult a mechanic specializing in convertible top repair.
Strongly recommended: Before attempting any repairs, consult your 1992 Chrysler LeBaron convertible's owner's manual. It will have the most accurate and detailed instructions. If you don't have the manual, you can often find a PDF version online.