You can also see how the IMSA connector is attached to the roll bar, conveniently located. Also, look at how awesomely the Sabelt harness’ little loops help attach the cord to the harness. This way it can’t get too far away.
With everything in the car and wired up, I turned on the radios, grabbed a friend, and pushed the steering wheel button.
Nothing.
Hmm…
I did some checking with a multi-meter and determined that the radio button was not actually shorting the pins together. It was connecting one side to the ground. I consulted the original wiring schematics for the car, and the button was designed correctly. Tom and I just didn’t wire it correctly.
Fortunately, there were spare conductors in the curly cord, so some careful work with a razor (to remove the glue) and a soldering iron (to attach a different conductor) and a re-pin got things back in business.
I looked at some roll bar radio boxes, and they were ludicrously expensive for just being small metal things. After some thought, I decided that a 3D-printed radio box should totally work. I had already been in talks with John Freund Racing about a custom camera mount, so I asked him if he could copy some of the radio box designs. He agreed to take on my stupid cheapskate project, but he did an awesome job!
It has a square post and comes with a tube clamp for whatever size your roll bar tubing is. The nice thing about the square post is that it allows you to mount the tube clamp in multiple orientations.
