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Expert Answers about Deka

  • How to Charge Up a Trailer Mounted Battery While Driving
  • The 12 volt circuit on a 7-Way trailer connector is not adequate for charging up a trailer mounted battery. At best it can maintain the current charge in the battery assuming nothing is drawing power from it. Solar power takes a very long time to charge up a typical 12 volt car-type battery so it will need a little help to charge up the battery. Take a look at the DC to DC charger # 331-BCDC1225D. With this unit you can actually charge up the trailer battery while you drive. It has inputs...
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  • Is Circuit Breaker Needed When Wiring Deka Battery Isolator # DW08771
  • When wiring up the Deka Battery Isolator # DW08771 the main/first battery will connect directly to position one on the isolator without the need for a circuit breaker. The second battery though should be attached to the second position on the isolator via a circuit breaker that is rated appropriately for the battery. The alternator will go to the A post on the isolator. I have attached a diagram that you might find helpful as well. You should not have to worry about the second battery...
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  • Recommended Parts to Add 7-Way Trailer Wiring to 2018 Toyota Highlander Hybrid
  • For your 2018 Toyota Highlander, because you already have the 4-way trailer connector and don't want the brake controller wiring, you simply need to add the Mighty Cord Trailer Connector Adapter # A10-7084VP. Installing this adapter means connecting to your current 4-way and then connecting the white ground wire with the ring terminal to a bare metal connection to the frame or frame mounted panel. Then to add the 12V power, you will use wire # 10-1-1 sold by the foot and connect it...
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  • Recommended Battery Isolator For House Battery and Solar Panel Charger
  • For your application, you will want the Deka Battery Isolator - 120 Amp, # DW08771. This will enhance your alternator performance and allow you to efficiantly charge your battery. This will protect your main starting battery from auxilary drain and regulate current for multi-battery systems. We will want the Deka Battery Isolator Installation Kit for Standard Alternators, # DW08769. This kit will give complete instructions, various terminals and connectors, 15 feet of wire and a...
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  • 4-Pole Wishbone Harness for Running Light Connection
  • Connecting the brown running light wire in standard 4-pole wiring to both tail lights will require a jumper wire from one side of the trailer to the other, or you can install what's called a wishbone harness that has dual brown running light wires, one for each side of the trailer. We have several of these trailer-side 4-pole wishbones, such as 40-foot # A40W42B, 35-foot # A35W42B, 25-foot # A10-4225VP and 20-foot # A20WB. I do recommend using a wishbone harness instead of a spliced...
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  • Recommended Wire Gauge for Wiring Electric Brakes on Trailer
  • For your flat bed trailer, I recommend using 12 gauge wire like # 12-1-1 at the minimum, but preferably 10 gauge wire like # 10-1-1. Both of these wires are sold by the foot, so you can order the exact length you are needing. If you were to use a thinner gauge wire than this, the 12V power needed to activate the electric brakes may be enough to overload the wires and cause them to overheat. I have attached an article on adding electric trailer brakes to a trailer that you might also...
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  • Recommended Battery Hold-Down for 6-5/8 inch Wide Battery
  • To secure your battery that is 6-5/8 inches wide, I recommend looking at the Deka Universal Battery Hold-Down Cross Bar # DW00246. This battery hold-down crossbar can adjust from 5-3/4 inches to 8-1/2 inches wide, so it will work great with your group 27 battery.
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  • How Does Battery Get Added to Trailer for Powering Interior Lights
  • Best way would be to run the power wire of your trailer connector to the positive post of a trailer battery and then running the power wire of all of the accessories to the positive post of the battery. That way it's drawing from either source but the battery still gets a maintenance charge when connected to tow vehicle. Basically it's a matter of installing a battery box so that you can securely install a battery and then running the 12 volt acc circuit of your 7-way to the positive...
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  • Parts Needed to Install Additional Battery in Truck for Truck Bed Camper
  • You will need a battery isolator like the Deka # DW08770. This will install by running between your alternator and your truck's current battery. Then the second battery will run off the isolator as well. If you need a 120 amp isolator use # DW08771. For an install kit we have # DW08769.
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  • Brake Controller WIring on a 2007 Ford Van E-350 with No Tow Package
  • The blue brake controller output voltage wire extends from the factory connector under the dash and terminates in the engine compartment near the fire wall. Due to the cramped quarters in the engine bay, This wire is very hard to locate. Our installers typically abandon it and simply run a 2 conductor wire like part # 10-2-1 back to the trailer connector. One lead of the wire would connect to the blue wire exiting the rear of the controller, and the other would run from the trailer connector...
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  • How To Wire a Trailer Tail Light with Yellow, Black, Red, and White Wires
  • The best way to find out what each wire is for on your tail light is to take a 12 volt power supply and apply that to each of the wires to see which bulb it illuminates. I cannot really give you an exact function for each color as it could vary from manufacturer to manufacturer. With that being said, we have the Fusion LED Combination Tail Light Bar part # STL264RB which contains white, black, red, and yellow wires. The functions of these colors on this lights are as follows. This may...
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  • Wire Gauge Recommendation for Wiring Up Brake Output Circuit on Trailer
  • The heavier gauge the wire the better. We recommend 10 gauge wire like part # 10-1-1 (sold by the foot), for wiring up the brake output circuit. Since the wire is so long it's important to go with a thicker wire to reduce resistance even though the brake magnets use thinner wire. Especially since the wire gets teed off and ran to multiple brake assemblies.
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  • Methods to Clean Contacts in 7-Way Trailer Socket on 2010 Dodge Ram 2500 Pickup
  • Inside your Ram's factory 7-way trailer socket are multiple lighting circuits and a 12V power circuit that is there to power an electric trailer tongue jack or to deliver a trickle charge to a battery mounted on the trailer. If you refer to the linked photo you can see which function/circuit is assigned to each of the electrical contacts inside the connector. The 12V power circuit is carried on the pin at the 1:00 position as you look at the socket. If your wire brush were to contact...
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  • Installing 12 Volt Power Circuit to 7-Way Trailer Connector on Rear of Tow Vehicle
  • Generally, the center pin on a standard 7-way is used for reverse lights on the trailer. However, not all trailers have reverse lights and essentially you can wire the extra pin anyway you'd like. Normally, the pin in the 1 O'clock position when looking into the vehicle side connector is for 12 volt power which would be used to maintain your trailer batteries. If your tow vehicle does not provide any 12 volt power to an existing 7-way connector it could be because there are fuses or...
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  • Wiring Configuration for Trailer Side Marker Lights
  • The usual configuration for 4-pole trailer wiring has the WHITE wire as GROUND, the BROWN wire as RUNNING LIGHTS, the YELLOW wire as LEFT TURN/STOP and the GREEN wire as RIGHT TURN/STOP. If your light has white and brown wires coming out of it then typically the brown wire would connect to the + side of the running light circuit and the white wire would ground to the trailer frame, or could be run up to the trailer plug's ground. One way or the other the light must have a ground and a +...
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  • Amperage Ratings of Deka Battery Isolators DW08770 and DW08771
  • A battery isolator should be rated for at least the same capacity as the alternator output and the higher-rated battery, but a higher-rated one would be great too as this would tend to potentially improve its durability in your application. We have several isolators, including the Deka # DW08770 rated for 95-amps and 120-amp-rated # DW08771.
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  • Availability of Battery Bolt Extender that is 5/16 inch Thread Size
  • We have the Brass Battery Terminal Bolt Extender # DW05418 which has the thread size of 5/16-8 like you need and is 1-7/16 inches long.
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  • Recommended Wet Shackle Bolt And Shackle Strap For 1-3/4 Inch Double-Eye Leaf Spring
  • We do have a wet bolt that will work with the # SP-218275 leaf springs you said you are going to use. I recommend part # 34007-187-00. This bolt measures 3-7/16 inches long and the usable length is 3-inches. The locknut for that can be used with this wet bolt is sold separately and is part # 192600. For the shackle straps, the closest we have to the 2-1/2 inches you said you need is part # 115052GALV. This strap measures 4-inches overall and the center to center for the holes is...
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  • What Gauge Wire Can Trailer Brake Circuit Have
  • That is a valid question. We strongly recommend people use 10 gauge wire like the part # 10-1-1 (sold by the foot), but we realize that there are a lot of people who get by with 12 gauge wire. There are several variables with trailer brake wiring that we generally do not know when our customers ask about the wire gauge that should be used for re-wiring a trailer's electric brakes. The length of the trailer (and the required wiring) and the number of axles (and brake assemblies) can vary...
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  • DC Power Battery Charger for Maintaining Service Battery on Dump Trailer
  • For charging a dump trailer's on-board battery each of the vehicles towing it needs to have a fully-functioning 7-way trailer connector. The 7-way includes an auxiliary 12V power circuit that is carried on the pin at the 1:00 position as you view the socket (please see the linked photo). This circuit can deliver trickle-charge power to the trailer battery, but to keep it fully charged you will want to install a heavy-duty DC to DC charger like # CTEK40186 that takes in that same 12V power...
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  • How is the Length of the Deka Wire - Jacketed 7-Wire DW04914-1 Ordered
  • The # DW04914-1 is actually sold by the foot. What you would need to do is order a quantity of the length you need and we will ship you out the length you need.
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  • How Much # 10-2-1 is Needed to Wire up a 7-Way in a 2000 Chevy Silverado
  • It's better to order too much than not enough, since there are variances in vehicle lengths I think at least 20 feet would be enough, especially considering turns and bends in the wire will require more length. Or you could measure the entire length of your vehicle and order that as the length of the Jacketed 2 Wire, 10 Gauge, Brake Wire - per Foot # 10-2-1 that you would need.
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  • What Gauge Wire Should Be Used to Wire Up Trailer Brake Assemblies
  • If it were me I would go with 10 gauge wire. For that you would want part # 10-2-1. Some people use 12 gauge wire and have success, but honestly I would rather have to heavy of gauge wire than not heavy enough. So to be on the safe side I would go with the 10 gauge. The 10-2-1 is sold by the foot, so you will need to order a quantity of how many feet you would need. I attached an FAQ on trailer wiring for you to check out as well.
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  • Availability of Side and Top Post Battery Terminal Cleaners for Powered Drills
  • The Deka Battery Terminal Cleaning Brush for Power Drills are available in both quantities of 1 using part # DW05515-1 and 5 using part # DW05515. The price can be found on the product page. As the title states, the terminal cleaners attach to a standard power drill and make cleaning the battery terminals on your top post battery quick and easy. Clearing the battery terminals every so often will ensure you are receiving the full potential and life of the battery. If you have side post...
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  • Troubleshooting Interior Lights Not Working for Enclosed Trailer
  • The interior lights of your enclosed trailer are likely connected to the 12V (Auxiliary) power pin on the 7-Way of your trailer. You can verify this by applying 12V power from a separate battery to this pin and seeing if that supplies power to your lights (see attached picture). If your 2007 Chevy TrailBlazer doesn't have power on the corresponding pin (see attached photo) then that would explain why your interior lights aren't working. I took a look at the online owner's manual for...
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  • Wiring Needed to Tow Trailer Behind Trailer with Vehicle that has Second 4-Way Connector
  • What you would need to make the adapter you want is 4-way jacketed wire sold by foot part # DW04923-1 (you'd need a quantity of 50) and then a 4-way on either side of that like what the part # 48195 offers and you'd be set. This will allow you to use the second 4-way trailer wiring connector you have at the rear of your vehicle.
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  • Amperage Rating for the Deka 2 Gauge Professional Service Booster Cables # DW00161
  • The Deka 2 Gauge Professional Service Booster Cables # DW00161 is 2 gauge copper wire that is 24 feet in length so the amperage rating is 200 amps.
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  • Isolator Relay Recommendation for a Allowing Switch Power Cable for Trailer Battery
  • What you are going to want to install on the power cable that runs from your tow vehicle to the battery is the isolator part # TR118665. Connect the power cable on either end of the isolator and then run a separate power source to the middle pin of it with a switch installed on it like part # D16740. This will allow you to control the power of the circuit by flipping the switch.
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  • Replacement 7-Way Trailer Wiring Junction Box Installation
  • We can help you get your RV's 7-way wiring sorted out. The easiest way to go is to replace the whole junction box with Epicord # 277-000141 since this has a pre-wired 7-way. This means you only have to make the RV side connections. The wire gauge will be thicker for the 12V (black) and ground (white) wires which gets a few of those out of the way right off the bat. It sounds like you already tried testing the functions on the RV wires. This process is usually pretty straightforward....
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  • Which Wire Sized Should be Used for Electric Trailer Brakes
  • You should use 10 gauge wire for electric brakes which is pretty much the standard size for electric braking applications because it can handle the amperage better over the long distance from a brake controller to the electric brakes. For a nice duplex cable with two 10 gauge wires you can use # 10-2-1 which is sold by the foot. I have also included a link to our help article on adding electric drum brakes to a trailer.
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