by David Zatz
After installing an LED third brake light into a 1974 Plymouth Valiant, I told lighting expert Dan Stern that Hella’s wire-tap hadn’t been easy to work with or reliable-looking (I was wrong about that, it’s been working fine for nine years). He mentioned Posi-Products’ taps, I made a quick inquiry, and a box arrived a few short days later.
Now here were things I wished I’d known about when I upgraded 1970s cars with new stereos: Posi-Fuse. Posi-Twist. Posi-Lock. And, of course, Posi-Tap.
They all use the screw principle to help you to twist wires together or tap into existing lines with a little spike. The twist method is used in many connectors, but using two-part connectors to keep the wires together, without electrical tape, is a real innovation; so is screwing in a spike to tap into a cable.
The Posi-Tap worked remarkably well. I selected the right size — 10-14 gauge, 14-18 gauge, or 20-22 gauge — took the wire I 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. I pulled and yanked at each part of the connection, despite not having tightened the pieces very hard (out of fear of damaging the main wire), and I couldn’t break it free.
Posi has numerous gadgets that work along the same lines. There are 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); 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 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.
They make a tough, resilient, long-lasting connection, and they do it more easily than the other methods I’ve used. The only downside is that they are quite expensive, regardless of where you buy them. Yes, you can save money using conventional connectors; but sometimes it pays to spend a bit more. [Visit Posi-Lock for a list of sales outlets.]
All reviews at allpar (including competitors) • Past reviews
Is there an error on this page? Let us know and you could win a prize!
More Mopar Car and Truck News