Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
4-Way Flat Wiring Harness Extension
Video of 48" Long 4-Pole Loop with Cover
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on our 2008 Chevy Express Van, were gonna install the Hopkins 4-Pole wiring kit with part number 31345. First, were gonna need to access the rear cargo area of the vehicle. Behind each taillight is the manufacturers connection. Well be plugging inline with this connector. To make our connection, well need to split the two manufacturers connection. Pressing on the locking tab, well pull them apart.
Now we can take our new Hopkins connector and plug inline with the manufacturers. Next, we can take our white wire with the ring terminal already pre-attached; this is our ground wire. Here to the body of the vehicle is a manufacturer ground. So what well do is go ahead and remove this bolt and make our ground connection here. Alright, now weve got our ground bolt removed, you can see that it wont fit to the ring terminal.
So what Im gonna do is go ahead and cut it off and replace it with the one thats slightly larger so itll fit to the manufacturer ground. Well go ahead and reinstall our ground stud with our new ground. Now were gonna go ahead and route the converter box 4-pole wire and our red power wire in the hide in paneling and bring it out the lower access. Now with those wires in place, were gonna go ahead and set them aside for now and route the passenger side connector and green wire over behind the taillight on the passenger side. To do this, well just gonna follow the manufacturer wiring up and around the door frame.
As I go along, Ill just use some black zip ties to secure the wiring. Now weve made both connection points behind the taillight and we secured the wiring, lets go ahead and go back, cut up any excess from the zip ties with a pair of side cutters. This will just clean up our install a little bit. Alright, now that weve got our signal wire run and secured, we need to go back and add to our power wire. Our red wire with the yellow butt connector comes directly out of our converter box and well add it to the additional red wire supplied with our install kit.
For a little added security, Im gonna go ahead and wrap the connection point with some black electrical tape also. This will help to keep out any dirt, moisture and debris. Now, both wires, which is our 4-pole connection point and our red power wire need to be routed outside of the vehicle. Were gonna run straight down to the inside of the body panel using a couple of metal clamps to secure our wire and routing it along the floor, underneath the weather stripping and outside the vehicle that way. For an added security measure, you may add a zip tie here to secure their wiring and our converter box. Now to route our wires, well just come along the floor of the van and out the corner. What Im gonna do is take a pair of tin snips and cut a little of the body away so that we can make that corner and reinstall the wire stripping. Then we can feed our wires underneath the vehicle where our 4-pole will be routed over to the hitch and our red power wire is gonna get routed up along the frame to the battery. Were gonna be extra careful to stay away from moving components such as a steering or suspension or excessive heat such as the exhaust. Were just behind the front axle of our vehicle and weve run out of length from our power wire. The reason for this is because were working with an extended version so the length of the power supplied in our install kit isnt quite long enough. But now what were gonna do is strip down the wire and well add a butt connector and some additional length to our power wire. Just as I did before, well go ahead and tape up the connection point. Now we can go ahead and continue routing our wire. Alright, now weve got our power wire straight up into the engine compartment. Were right here at the battery so Im gonna install to the manufacturers wiring over to the positive battery terminal. Now, before I completely secure my wiring, we need to add a fuse holder. To do this, Im gonna cut off any excess length from my power wire, strip it back and add it to the butt connector on the fuse holder. Just as we did earlier to our butt connectors, were gonna go ahead and use some black electrical tape and tape this one also. Now, before I make my connection to the battery, Im gonna go ahead and remove the fuse and then reinstall it after we make our connection. Now we can go ahead and make our reconnection with our power wire ring terminal to the battery. However, with the side post mounted battery style, youll need to add a battery extender to do so part number DW05416. To add our extender, first well need to remove the old battery post. Now, to remove the positive battery terminal from the positive battery cable, well need to go ahead and push it out from being held in with the rubber coating around it. Now that we have the old one out, we can go ahead and install the new one then well reconnect the positive battery cable. Now well go ahead and remove our hold down nut and install our ring terminal and well secure that with the hold down nut and tighten it down. Now were ready to go ahead and reinstall the fuse in the fuse holder. As you can see, our 4-pole connector isnt gonna be long enough to attach to center of the hitch. So what well do is to add a 4-pole loop made by Hopkins part HM47115. As part of the install kit for our 4-pole loop comes dielectric grease. Well go ahead and take some dielectric grease and place it directly into the connector. Once theyre firmly together, Im gonna go ahead and take some black electrical tape and tape up the connection just to assist in keeping out any dirt and debris. Now weve got our connection made, well go ahead and route it to the center of the hitch. Now well go ahead and take some black zip ties to secure our wiring then we can take the end cap provided with our new 4-pole loop and install it at the end of our new 4-pole connector and secure it to the hitch. Thatll complete the install of our new 4-pole wiring by Hopkins part number 31345.
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Average Customer Rating: 



4.7 out of 5 stars (3 Customer Reviews)




by: no name04/17/2013
Is this review helpful?
Great quality, cheap prices 76579




by: Jason S.10/06/2012
Is this review helpful?
Good way to extended standard aux lighting wiring in an odd configuration light a truck camper. Product could be made better if it came with a cap for both ends instead of just the vehicle side.56549




by: Felix03/01/2010
Is this review helpful?
Excellent idea. Makes wiring from plug to lights much easier and more reliable. If plug gets damaged, now I only need to replace harness back to the junction box. I plan to install another box in the rear of the trailer to eliminate Scoth lock connecters that are susceptible to corrosion. Only suggestion, could have made the box smaller to fit inside the trailer channel. No need for it to be this big.2765
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