Now here is an overview of the wiring I changed in my truck for my ignition system. If you compare the force between my original 12 way Molex and my new 14 way Apex connector, it is amazing how easy these Apex connectors connect. The design of the connectors and terminals greatly reduces the force required for connection. Also the connectors keep the terminals in-line with each other. The male pin is forced down by the pre-loaded spring (the gold part) which creates a large contact area on the raised rib contact surface. The female pin is the key, the image below explains how the female pin is designed. The Apex connection system is very reliable. The average size is the 1.5mm terminals and those pesky burnt ignition wires use the 6.3mm terminals. There are only a few different sized terminals as you have probably noticed. This guide is what you need to read first. This guide contains just about all the information you need, including how to assemble/disassemble connectors (you need needle nose pliers) and a description of the terminals with part numbers. To start off with, here is a link to a PDF file that explains the FCI Apex connection system. Now that I found all of this information, I want to share it with others who may have the same intentions that I had or that need to replace a few things. I refuse to use t splices or crimp connectors on this sort of thing. I originally used a 12 way Molex connector which did the job but not near the quality that I wanted. When I started creating my custom ignition system, I needed a way to tap into the existing wiring in a clean and reliable way. This information took me a year or so gather. Unused terminal slots can be sealed with a plug. These connectors can be weatherproofed with seals around the joint of both connectors and seals around each wire. If you plan on adding wiring to your vehicle or equipment, read this because it will save you a headache down the road. These are also used on farm equipment, generators, and in other harsh environments needing a reliable connection system. These Apex connectors are used in Chrysler, Ford and GM vehicles. FCI makes a family of connectors called Apex. Here is a simple guide to the wiring connectors and terminals used on our Dodge Ram trucks.
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