1. Safety First:
* Disconnect the negative battery cable. This is crucial to prevent electrical shocks and short circuits.
* Secure the vehicle. Use parking brake and wheel chocks.
2. Access the Alternator:
* The alternator is typically located on the front of the engine, near the engine block. Its exact location may vary slightly. You'll likely need to remove some components to gain access. This might include:
* Air cleaner assembly: Remove the air cleaner housing and air filter.
* Serpentine belt: You'll *almost certainly* need to remove the serpentine belt. Consult a repair manual for the proper routing and tension release procedure. This usually involves loosening a tensioner pulley.
* Other components: Depending on your engine and the alternator's location, you may need to remove or loosen other components like the power steering pump or accessory brackets. Again, a repair manual is essential here.
3. Disconnect Electrical Connections:
* Remove the alternator's electrical connectors. There will be at least two – one for the large power cable and one for the smaller signal wire. Take pictures or make notes to remember their positions for reassembly. Some connectors might require a special tool for removal.
4. Remove the Alternator Mounting Bolts:
* Locate the alternator mounting bolts. These are typically two or three bolts securing the alternator to the engine block or bracket.
* Remove the bolts. Use the correct size socket and wrench. They may be difficult to access due to tight spaces.
5. Remove the Alternator:
* Carefully remove the alternator. It may be heavy, so be prepared to support its weight. It might be slightly tight, requiring some gentle persuasion.
6. Reinstallation:
Reinstallation is the reverse of removal. Make sure everything is properly aligned and tightened to the manufacturer's specifications (found in your repair manual). Double-check all electrical connections before reconnecting the battery.
Important Considerations:
* Repair Manual: This is absolutely essential. A Chilton's or Haynes manual specific to your 1990 Chrysler New Yorker will provide detailed diagrams, torque specifications, and step-by-step instructions. Attempting this without one significantly increases the risk of damage or injury.
* Tools: You'll need the right tools, including various sockets, wrenches, possibly a serpentine belt tool, and potentially a ratchet and extensions to reach tight spots.
* Mechanical Ability: If you're not comfortable working on cars, it's best to take it to a qualified mechanic. This isn't a simple task for someone without experience.
This guide provides a general overview. Consult your repair manual before beginning this project. Improperly performing this repair can lead to damage to your vehicle or personal injury.
