After installing an LED third brake light into our 1974 Plymouth Valiant, we chatted with lighting expert Dan Stern, and mentioned that the tap sent with the light hadn't been the easiest thing in the world to work with, or for that matter the most reliable looking device we'd ever seen. Boy, we said, it sure would be easier to do this if there was something that didn't require so much effort, and didn't break the first time we used it. He mentioned that he had been intrigued by Posi-Products' lineup, but hadn't had time to look at it. We made a quick inquiry, and a box arrived a few short days later with all sorts of gadgets we hadn't known about. Posi-Fuse. Posi-Twist. Posi-Lock. And, of course, Posi-Tap.
These gadgets all work on the same principles: they help you to twist wires together, securely, or they stick a little spike through the insulation of an existing wire in the case of the tap. Twisting wires together is nothing new; electricians have used those little wire cups for years. What is new is the use of two-part connectors so that the wires stay together and you don't need any electrical tape, which comes apart with heat or age, gets everything sticky, and generally is not the most elegant solution.
The Posi-Tap worked remarkably well and quickly. We selected the right size, which you can either do by trial and error (by getting the size that fits just right) or by actually measuring the wire gauge — they come in three sizes, 10-14, 14-18, and 20-22 — and then figured out how it worked and verified our guesswork by looking at the instructions on the back of the packet.
From there, it was easy. We took the wire we wanted to splice into, and fitted it into the slot in the base; screwed on the main part of the tap; and then fed the wire we wanted to run into that circuit through a little hole in the other part of the tap, and maintaining a slight pressure, screwed in the final piece. It's easier to see in our video:
What was really amazing about this system was the way it held together. We pulled and yanked at each part of the connection, keeping in mind we did not tighten the pieces very hard out of fear of damaging the main wire; and we couldn't break it free. This is unquestionably an easier way to do things upside down in the depths of a Valiant dashboard, and we really wish we had this back in the days when each year or two brought a new used car and a new stereo to install.
Also in the box, as we mentioned, were some other gadgets that worked along the same lines. There were two types of fuse splices, which required that one cut a wire (or have two wire ends to put a fuse between, which makes sense because there is no point in having a fuse that you bypass anyway; these work by the simple "twist the wire around a pole" method, and the wire is locked in by the plastic screw on the outside. It makes adding a fuse the work of less than a minute, and provides a pretty tough, secure connection. The method is the same as with the splice, and two styles of fuse are available.
The Posi-Twist is similar; it lets you connect strands of wire (up to ten of them) by the end, using the twist-around-a-pole-and-then-secure method. Likewise. there is a Posi-Lock for when you want to connect two wires in a straight line rather than having their ends line up.
We were very impressed by these products; they make a tough, resilient, long-lasting connection, and they do it more easily than the other methods we've used. [Visit Posi-Lock for a list of sales outlets.]
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