19 Sep
Making your own Wiring harnesses for your Rv or Motorhome
Making your own Wiring harnesses for your Rv or Motorhome
Making and creating your own wiring harnesses for youre motorhome is not that hard read more to find out how. To illustrate this I am going to show you how to make a harness for factory speakers in order to convert them to fit aftermarket speaker plugs in your RV.
Tools and materials needed for this section:
- Solder
- Heat Gun
- Heat shrink
- 2 Core wire
- Soldering Iron
- Split tubing or Conduit
- Corresponding Plug connector
- Spade Terminals Normal and Mini
You can use this theory and make it suit any application for Wiring harness plug adapters in your Rv or Motorhome that you wish to.
There is no limit to how you can use this information, and knowing how to make wiring harness plug adapters, should give you the know how to repair or trace faults in wiring as well.
The first thing I am going to do is make an loom to adapt from a set of factory speakers to suit after market speakers. This means that we are going to keep the factory plug that attaches to the factory speakers and change it to suit our after market speakers.
Now before you can get into the speaker itself you will find you have to remove the speaker cover which may be just clipped in place, simply pry the clips inwards and it should pop free. You also have to remove the door trim in your Rv first of all. Now, knowing that all vehicles are different in the way that they are fixed to the door shell, I am unable to tell you how to locate these with your specific vehicle. To do this, please search the Internet, for door removal instructions with the make of your vehicle, such as “FD166 Hino door trim removal”.
You may have to try this with and without the quotes in your search engine. After you have found that information you may proceed with your door trim removal. After all the screws have been extracted you will then be able to see the speaker and the spacer or surround that it is sitting in. All you do now is remove the screws or rivets that are holding the speaker in place, remove the speaker and the speaker plugs from the vehicle and put the speaker on the desk or bench.
As you may well know the after market speakers normally come with two spade terminals in female configuration, and some come with a large and what is called a mini spade terminal. For today we are going to cover the large and the mini female terminal application as well as the factory 2 pin offset plug.
The first step is to source out spade terminals for the job and our wire that we are going to use. It is okay to use your plain 2 core speaker wire for this job as no current (power) will flow through them and they are marked with a red line to denote the positive. Although many people will choose to use a higher grade of speaker wire for the job, and if you do you can get this wire from any Supply parts store such as Crutchfield.com i.e. Electrical outlets, Autobarn, Supercheap, or your more targeted stereo places such as Pimp my ride and so on. The higher the grade of wire you use the better the sound.
Seeing as we are only going to make a very short adapter in this case I am going to use the plain 2 core wire. All we do is cut the wire to length and grab a couple of terminals to fit to our speaker. We then grab out wire strippers and take about 5 to 10 millimeters of the two ends exposing the metal conductor, being very careful not to cut any of the conductors. Then we will twist the conductor to make a tight end with our thumb and forefinger. We then take a soldering iron; I am using the butane soldering iron for this job as it heats up quickly. We then tin the wires with our solder (basically heat up the conductor then melt the solder into the wire until the conductor is covered).
Before fitting the terminal fit a piece of heat shrink over the wire and terminal base, this will make for a tidy joint and much more element proof. Then we use our terminal pliers to fit the terminal to our tined wires. Make sure the terminal is fitted firmly and then slide up the heat shrink over the end of the terminal, then grab your heat gun and shrink down the heat shrink, do not hold the heat gun on for too long as this will melt the wire. Repeat this step for all your speaker wires.
Now we will fit our female connector to the other end of the adapter. You will need female spade terminals for these ends and they are slightly different to your normal female spade terminals and they are not insulated. What you want to have in these terminals is a small tag on the spade surface that will grab hold of the connector when you insert it in. Please see the picture below :
The ones in the picture are female and you will want the male type for this job.

Once you have stripped and tinned your wires we can now fit our female terminals to the wires, then all we need to do is fit the connector and you are nearly done. Now for the final touches, we cut a bit of our conduit and fit it over our wires. And there you have it a custom speaker adapter.

















