Q: How to replace the ignition module on Mercury Capri?
A: The ignition control module is a delicate and relatively expensive electronic component. Failure to follow the procedures could result in damage to the module or other electronic devices, including the EEC-IV microprocessor itself. Additionally, all devices under computer control are protected by a Federally mandated extended warranty. Check with your dealer before attempting to replace them yourself. Duraspark I and II ignition control module: Detach the cable from the negative terminal of the battery. Vehicles equipped with a Duraspark I or II system may have either the standard Duraspark I or II module or the universal ignition control module. If your vehicle is equipped with the standard module, unplug both connectors; if your vehicle is equipped with the UIM module, unplug all three connectors. Remove the mounting screws and detach the module. Installation is the reverse of removal. TFI-IV ignition control module: Remove the Distributor from the engine if access to the module is blocked. Remove the two module mounting screws with a 1/4-inch drive 7/32-inch deep socket. Pull straight down on the module to disconnect the spade connectors from the stator connector. Whether you are installing the old module or a new one, wipe the back side of the module clean with a soft, clean rag and apply a film of silicone dielectric grease to the backside of the module. Installation is the reverse of removal. When plugging in the module, make sure that the three terminals are inserted all the way into the stator connector. Disconnect the negative cable from the battery. Disconnect the electrical connector from the EDIS ignition control module. Remove the screws securing the EDIS module to the lower intake manifold. Installation is the reverse of the removal procedure. Prior to installing the EDIS module onto the manifold, apply about a 1/32-inch of silicone dielectric compound to the mounting surface of the module.