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Expert Answers about Pollak

  • 7-Way RV Trailer Connector Wiring Diagram
  • When wiring a trailer connector, it is best to wire by function, as wire colors can vary. We have an excellent wiring diagram on our website, I will provide you a link so you can look at it. If you are looking at the inside of the trailer connector where the wires mount to the terminals starting at the notch at the top and working clockwise: 1:00 is Black and 12 volt power 3:00 is Green and Right Turn and Brake 5:00 is Blue and Brake Controller 7:00 is White and Ground 9:00 is...
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  • 7-Way, Vehicle End, Trailer Connector Wiring Diagram
  • See the picture to the right for a wiring diagram of seven-way vehicle end trailer connector. If you click on it you can enlarge it. I have also included a trailer wiring FAQ page for you to check out.
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  • How to Wire a 6 Pole Round Trailer End Plug
  • There is a suggested and common method for 6 function trailer wiring. You will have the following functions: Right Turn, Left Turn, Ground, Tail/marker, Brake, Battery. I have included a help article on trailer wiring that includes a diagram and wiring matrix that explains wire color, function, and gauge needed, among other helpful information. Also, there are pictures to the right that show how the connector and receptacle wire by color and function. And I have included a link to a...
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  • Troubleshooting Electric Trailer Brake System on Trailer Towed by Chevy 2500 Series Truck
  • Discovering why the trailer brakes are not getting power will be a process of elimination. I am not aware of what you have and have not checked, so I will describe the whole troubleshoot process. Start with the brake controller itself. Is it properly adjusted and leveled (if necessary) according to the instructions? Is it getting power? To determine if the controller is receiving power, you can use a circuit tester like part # 40376 on the black wire that feeds the controller to ensure...
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  • Wiring Diagram for a 7-Way Round Pin Trailer Connector on a 40 Foot Flatbed Trailer
  • I do have a handy trailer wiring FAQ article that would be perfect for you. I have included a link to it. I have also included a picture that shows the typical wiring diagram of a 7-Way round pin trailer side connector. As you can see, the 7-way round pin trailer connectors do not use the typical pin functions. The round pin style connectors are typically used on heavy-duty trucks which are wired differently from typical RV or equipment style trailers. You can wire a 7-way round pin connector...
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  • Testing for Proper Voltage on the Brake Output Circuit
  • There are many things that can affect the voltage on the brake output wire from your brake controller to your trailer brakes such as the power setting on your brake controller, how you are testing the wire and if you are testing it with the brakes or manual override activated. Using a multimeter to test the voltage on the brake output wire at your trailer connector will not always give the proper reading because it does not provide a load on the circuit like brake magnets from a trailer...
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  • What is the Factory Wiring Harness Color Code for a 2007 Chevy Silverado
  • The colors that GM typically uses for their factory trailer wiring are as follows - Dark Green - Right Turn/Brake Lights Yellow - Left Turn/Brake Lights Brown - Tail Lights White - Ground Light Green - Backup Lights Blue - Electric Brakes Red/Black - 12 Volt Power We had a 2007 Chevy Silverado with the factory trailer wiring on our lot, so I went out and verified that it had the same color code. I also noticed a white tag on the wiring harness that listed the functions of...
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  • Troubleshooting Right Side Trailer Lights Not Working, Left Side Working Correctly
  • Most trailer wiring problems are the result of a bad ground. What I would do is start with the connectors. Maker sure the connectors on both the trailer side and vehicle side are free of dirt and corrosion and that they are properly grounded. Next, I would move on to testing the vehicle side connector using a circuit tester like # 3808. Since the right side is not working, you will want to test the pins of the connector for right turn and brake. If looking at the face of the connector,...
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  • Installing Third Brake Light and Dome Light into Truck Bed Cap
  • If you will take a look at the wiring harness up above the spare tire, you should find the connector that the 7-way plugs into. If you trace the loom back just a bit, you will find a light blue wire that is used for the 3rd brake light for your truck cap. If you will follow the provided link, see Step 3 figure B. This photo will show you the location of this wiring harness above the spare tire. For the interior dome light, there are two common methods both of which will require a switch,...
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  • What Gauge Wire to Use When Wiring a Trailer for Brakes
  • It is recommended that you use 10 gauge wire from the 7-way back to the brake assemblies on your trailer. Anything smaller than that and you might have problems. I would recommend you replace the wiring on your trailer to 10 Gauge Blue Primary Wire # 10-1-1. I attached an FAQ on trailer wiring for you to check out. I also attached a video that shows a trailer being wired for brakes for you to check out. Fast forward to the 4:53 mark to see the part about wiring.
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  • Wiring Pattern for a 7-Way RV Trailer Connector on a 2001 Chevrolet Silverado Without Factory Wiring
  • To install a 7-Way wiring connector at the rear of your 2001 Chevrolet Silverado without a factory 7-Way or a factory 4-Way connector, I recommend using the 7-Pole and 4-Pole Trailer Connector Socket and wiring harness, # HM40975-11998. You can the wire most of the circuits needed to the wiring harness that is located above the spare tire along the driver side frame rail. The wiring above the spare has a yellow wire for the left turn and brakes, dark green wire for the right turn and...
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  • Wiring Diagram for the Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector # PK11700
  • Yes, the 7-Pin Round connector is wired differently than the 7-Way flat RV connector. I will list the typical heavy duty truck wiring connections inside the plug on the trailer side for you. At the index guide for plugging the trailer end in to the vehicle end the pin directly below will be the ground connection. Going clockwise the pin in the 1 o clock position is for 12 volt power the pin in the 4 o clock position is the left turn signal and hazard the pin in the 6 o clock position...
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  • Wiring Diagram for 7-Way Round Pin Trailer and Vehicle Side Connectors
  • I have added a photo detailing the wiring connections for the Pollack Heavy-Duty, 7-Pole, Round Pin conncetor, # PK11700, see link. This is a SAE J560 compliant connector. The wiring diagram for the vehicle side connector, # PK11720, is pictured also.
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  • How to Rewire an Old Cattle Trailer
  • It sounds like you are on the right track to rewire your cattle trailer. You are correct about the wire colors on the 7-way connector that you purchased. The colors that you see on the 7-way connector are typical for RV style trailers rather than utility, cargo, or livestock style trailers. The black wire should be connected to the terminal in the 7-way connector labeled black. This is the terminal in the 11 oclock position when you are looking at the back of the trailer connector (see...
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  • What Gauge Wire Is Required On a 7-Way Connector
  • On a 7-Way connector the suggested minimum wire gauge for the White (ground) wire, the Red or Black (power) wire, and the Blue (brake power) wire is 12 gauge. The minimum wire gauge for the remaining Green (right turn/brake) wire, the Yellow (left turn/brake) wire, the Brown (tail lights) wire, and the Purple (reverse light) wire is 16 gauge. I have the Hopkins 7-Way Molded Trailer Wire Connector with Lead, part # H20042. This is a 7-Way blade plug on one end and a 3 foot wire lead....
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  • Wiring Diagram for a 1997 Peterbilt Semi Tractor with 7-Pin Round Connector
  • The wiring color codes and wire gauge recommendations for the Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector, item # PK11700, are listed below. White - Ground Return - 8 gauge Black - Clearance, Side Marker, Identification - 12 gauge Yellow - Left Turn and Hazard Signal - 12 gauge Red - Stop Lamps and Anti-Lock Devices - 10 gauge Green - Right Turn and Hazard Signal - 12 gauge Brown - Tail, Rear Clearance, Marker and License-Plate Lamps - 12 gauge Blue - Auxiliary...
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  • How to Wire 4-Way Round Pin Trailer Wiring Connector PK11409
  • There is not an industry standard layout for wiring the 4-Way round pin connector, but there is a layout that is most accepted. If you you are looking at the front side of the 4-Way round trailer side plug, the top left prong would be used for right hand turn signal and brake function, the top right pin would be the left side turn signal and brake light function, while the bottom left would be used for the tail light function. The last pin, on the bottom right would be used for the...
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  • Chevy Silverado Third Brake Light Wiring Source for Camper Shell
  • The main trailer wiring harness is located under the truck bed, usually above the spare tire. There is usually a socket for your trailer connector to plug into, but if you peel back the wire loom you will find a light blue wire further up in the wiring harness that is intended for use for a third brake lamp on a camper shell. I attached a couple pics to help you see where the wire is at.
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  • 7-Way Blade to 7-Pin Adapter for Towing a Trailer with A 7-Pin Connector
  • The wiring for the 7-Pin connector is different than the 7-Way blade connector. You will need an adapter to make the two different styles compatible. You can use the Adapter 7 Way (Blade) to 7 Way (Round Pin), # 47595. The blade end plugs into the 7-Way on your vehicle and the trailer round pin 7-Way will plug into the receptacle. I have also included a link to a wiring FAQ article that shows how the two styles differ from one another.
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  • Converting From 7-Way Round to 7-Way Flat Connector
  • We do offer the Pollak Trailer Connector Adapter, # PK12-724, which converts a 7-pole round connector to a 7-pole flat connector. This adapter works for tow vehicles with combined taillight wiring, meaning that the turn signals and brake lights run on the same pin. If by chance your tractor has separate taillight wiring, meaning that the turn signals and brake lights run on separate pins, you will need to add a converter, like the Tow Ready, # 119130. Just cut off the 4 way end and wire...
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  • Wiring Diagram for 7-Way on a 2008 Chevy Silverado
  • Yes, we have diagrams for nearly every type of trailer wiring connector available. Check out the link I attached to see them all. Most likely you have a 7-way on your 2008 Chevy Silverado so I attached a picture of a diagram of a 7-way.
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  • Troubleshooting Tow Package Wiring of 2004 Chevy Suburban
  • Your Suburban has a fuse box under the hood, under the dash, and on the drivers side edge of the instrument panel. Each fuse box has fuses that relate to the towing circuits, see page 5-110 of your owners manual for a listing of the fuse locations. If the vehicle has never been used for towing before, it is unlikely that all the fuses that protect the tow package circuits have been blown. From what you describe, no power is reaching the plug under the vehicle that your 7-way trailer...
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  • Location of Fuses In Power Distribution Box To Install Brake Controller on 2008 Chevrolet Silverado
  • Sometimes the fuses are already installed from the factory, but if not the fuse slots are in the front of the box. I have attached a picture that shows the location of fuse slots. I have also linked a video installation of a brake controller on a 2008 GMC Sierra and an FAQ on brake controller installation on a 2008 Sierra/Silverado.
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  • Troubleshooting No Power in Trailer Connector PK11916 on a 2008 Chevy Silverado 2500
  • On your 2008 Chevy Silverado 2500, there could be several issues causing the plug to not have power. First, I included two pictures for reference below. In the first one, you will see the fuse box opened with a red wire going to the silver stud. This is the power that goes to a brake controller. If you look at the red wire that is below the white master cylinder in the picture, that is the wire you need for the connector to have power. It connects to the black stud. There is another...
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  • 7-Way Trailer Wiring Connector for a 2002 Chevy Silverado 1500 with Factory Tow Package
  • First I would need to know how your 7-Way connector is different than newer models. Is if pinned out differently (the pin functions are in different locations between the years) or is it that it connects to the vehicle differently? If it is the latter, you can use the Pigtail Wiring Harness, # PK11998, with Hopkins Wiring, # HM4097 or # PK11893 You would just need to wire in the bare wire ends of the pigtail to the truck wiring by function. The pigtail uses the following color codes...
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  • Why Do the Trailer Brakes Lock Up When 6-Way Connector Is Plugged Into Ford Truck
  • A 6-Way round pole connector can be wired one of two ways; with the center pole as the 12 volt hot lead, or as the brake. Having the center pole as the 12 volt hot lead is probably most common. In your case, the 6-Way round connector on your Dodge is probably wired with the center pole as the brake lead. The Ford is probably wired with the center pole for the 12 volt power. When you plug in the connector to your trailer and the center is 12 volt power it is just going to lock up the...
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  • How to Wire a 7-Way Trailer Connector on a 1994 Chevrolet C/K Pickup
  • To wire a 7-Way trailer connector at the rear of your 1994 Chevy pickup, you will need to start with a working 4-way connector, item # 118315, if your truck is not already equipped with one. You would then use the 4 Pole to 7 Pole and 4 Pole Adapter, item # 37185, and plug in the 4-Way on the truck to provide the stop turn and tail light functions in the adapter. If you do not need the brake control feed wire, 12 volt power wire or backup wire for your trailer you can tie one or all...
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  • How Do I Clean the Terminals in a 7-Way Connector
  • At this time we do not have a brush or other device specifically for cleaning the terminals in your 7-way connector. I have cleaned the connectors before and it can be quite a task with the limited space inside the connectors. You will need to be careful, especially on the vehicle side, not to short out two terminals and blow fuses or worse. Using a metal wire brush or liquid on the vehicle side would not be recommended. You could do so if you made sure all power is cut off at the connector...
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  • Turn Signals but No Brake Lights on Trailer tail Lights
  • Any time a trailer has turn signals that work but not the brake lights it can be an interesting situation. This is because the brake lights and turn signals on trailer tail lights are on the same circuit. In this situation it is almost always a bad ground connection. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer...
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  • Where To Attach Blue Wire From 5 Wires on Trailer When Installing a 7-Way Connector
  • When wiring a 7-Way on your trailer with 5 wires, your green wire will be right turn/brake, the yellow wire will be left turn/brake, the brown wire will be the taillights, and the white wire will be the ground. You will want to find out if the blue wire on your trailer is needed for 12 volt power for trailer accessories, for electric brakes, or for a reverse brake lockout, if your trailer has surge/hydraulic brakes. Looking at the rear of the 7-Way connector, if you need the blue wire...
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