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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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  • 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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  • 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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  • Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
  • It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side trailer connector using a circuit tester such as # ALL640595. Turn the vehicle headlights on and use the circuit tester to test the pins on the connector at the back. If there is no power on the running light pin then there is a break or loose...
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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 # ALL640595. 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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  • 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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  • 7-Way Wiring Diagram Availability
  • Check out the picture I attached plus the FAQ article to the right to see a 7-way diagram you could use to wire up your trailer.
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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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  • 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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  • 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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  • 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 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 Configuration For 7-Way Vehicle And Trailer Connectors
  • I have attached a photo that details the wiring connections for a 7-pole round pin connector. It also includes the vehicle side wiring as well. I have also attached a photo of the 7-way blade style connector as well. The center plus is an auxiliary 12V circuit. I do recommend using a circuit tester like part # 40376 and test each wire on the vehicle to make sure you have the correct configuration on your connector. I have also attached a link to a helpful article about trailer wiring...
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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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  • 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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  • 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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  • Trailer and Vehicle Side 7-Way Wiring Diagrams
  • The 7-way on your trailer could be wired correctly as-is. Not all 7-ways will have wires run to every one of the pins. Typically, if there are only 5 wires you will be missing the circuits will be the 12-volt accessory and the reverse light circuit. I attached a couple pictures that show how trailer side and vehicle side 7-ways wire as well as an FAQ article on trailer wiring
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  • Which Fuses Control Trailer Lighting Circuits on 2003 Ford F350
  • Like you said, it sounds like you have a tow package fuse that is either blown or missing. The fuses are located in the power distribution box under the hood or in a secondary, smaller box located on the firewall. Your owners manual or the lid of the fuse box should feature a diagram showing which fuses protect which circuits. From what I have found online, check fuse location # 1,3,4 and 16, making sure the fuses in those locations are present and not blown. If the plug was faulty,...
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  • Trailer Running Light Fuse Location on a 2012 Ford F-250
  • On your 2012 Ford F-250 power distribution box, under the hood, the trailer running light circuit fuse is in location 26 and is labeled as Trailer tow park lamps. The relay for this circuit is location 29. To test a relay the easiest way is to use a known good relay in its place. I was able to find this information in the owner's manual starting on page 321. You may also want to check where the trailer connectors plug into the vehicle wiring harness and to each other as well as the 7-Way...
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  • When Truck is Put in Reverse the Trailer Brakes Lock Up
  • Are you certain that you have the 6-way connector, like part # PK12720 with the 6 round pins? Or do you have the 7-way connector like part # PK11893 that features 6 blade-type pins with one connector in the center? The two can sometimes be confused. There are two possible reasons why the brakes are locking up on the trailer. If you have a surge or hydraulic coupler on the trailer, such as those typically found on boat trailers, the hydraulic brakes will lock up when the vehicle reverses...
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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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  • How To Get The Trailer Dome Lights Working On My Enclosed Trailer Connected To A 2010 Ford F150
  • If you are looking at the front of the 7-Way connector the # 4 terminal which is at the 1:00 position will be the 12 volt power connection. If you do not have power run to the # 4 terminal on the 7-Way vehicle connector you will want to run a 10 gauge wire like the #10-1-1, from the positive post on the vehicle battery through a 40 amp circuit breaker like the # PK54540, to the # 4 terminal on the vehicles 7-Way connector. This will give you 12 volt power to the 7-Way. You will then...
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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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  • 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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  • 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 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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