1. Disconnect the Battery: This is CRUCIAL to prevent electrical shorts and potential damage to the vehicle's computer system. Disconnect the negative (-) terminal first.
2. Locate the Ignition Module: This is usually mounted on the distributor, or very close to it, on the firewall. The exact location varies slightly depending on your Bronco's engine. Consult a wiring diagram or a repair manual specific to your year and engine for the precise location.
3. Disconnect Electrical Connectors: There will be one or more electrical connectors attached to the ignition module. Carefully disconnect these connectors by gently pressing on the release tab(s) and pulling them apart. Take note of how they are connected so you can reinstall them correctly.
4. Remove Mounting Bolts or Screws: The ignition module is typically held in place with one or two bolts or screws. Use the appropriate size socket or screwdriver to remove these fasteners.
5. Remove the Ignition Module: Once the fasteners are removed, the ignition module should come away from its mounting location.
6. Inspect the Module (Optional): Before installing a new one, examine the old module for any obvious signs of damage, such as cracks, burns, or corrosion.
7. Install New Module (if replacing): If you're replacing the module, simply reverse the removal steps to install the new one. Ensure the connectors are securely seated.
Important Considerations:
* Repair Manual: A repair manual specific to your 1990 Ford Bronco will provide the most accurate and detailed instructions and diagrams. This is highly recommended.
* Wiring Diagram: A wiring diagram can help you identify the ignition module and its connectors.
* Tools: You will need the appropriate sockets, screwdrivers, and possibly a ratchet.
* Caution: Be careful not to damage any wiring or other components during the removal and installation process.
If you are not comfortable working on your vehicle's electrical system, it's best to consult a qualified mechanic. Incorrectly installing the ignition module could damage other parts of your vehicle's electrical system.
