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Expert Answers about Chevrolet Vehicle Lights


  • How To Determine If I Need To Install A Brake Light Relay On My Towed Vehicle
  • It depends on whether or not the towed vehicle's brake lights illuminate when the brake pedal is pushed when the vehicle is being towed. If yes, then you'll need to install a brake light relay with # RM-88400; that way your vehicle will act in accordance with the signals sent by your RV.
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  • Command Electronics Ultra Modern Dual LED Tail Light Resistor Requirements
  • The Dual LED Trailer Tail Light # CE86FR will not require a resistor if you are mounting it on a trailer. The flash rate is determined off the vehicle and the LED bulbs in the trailer should not be affected. Some vehicles will give a lamp out indicator on the dash as they believe the bulb is out. This is mostly found on European vehicles and can be fixed with a Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142. If you are installing these onto a vehicle a resistor may be needed...
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  • Trailer LED Tail/Clearance Lights Illuminate at a Low Level Even When Tow Vehicle is Not Running
  • It is not unusual for extremely-efficient LED trailer lights to show residual low-level illumination when installed in lighting circuits that originally had incandescent lights. These circuits typically always carry some small amount of power even when the tow vehicle is off. With low-efficiency incandescent type lighting this low power will not be evident as it is not enough to cause those bulbs to light up, but with super-efficient LED lights it can be enough to make them illuminate. The...
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  • What is the Function of the Curt Vehicle Wiring Harness Little Black Power Module # C56331
  • The Modulite power module on the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C56331, for your 2013 Chrysler Town and Country contains a circuit board which is used as a relay for power from the vehicle battery to the trailer lights. During testing, Curt found that the tail light circuits on the Town and Country could not handle the power draw from trailer lights so a powered module is required to safeguard the vehicle's wiring and support the trailer...
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  • Best Way to Test Vehicle Wiring to Find Wire for a Specific Lighting Function
  • Auto makers do not always consistently use the same wire color for any given lighting function. If a vehicle production line runs out of a specific wire color they will switch to another wire color. This is rarely if ever documented. For this reason it is always best to test the wiring with a circuit tester like # PTW2992 to determine which light function on the vehicle appears on any given wire. Please refer to the linked video. The other way to find out the running light circuit's wire...
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  • Using the InvisiBrake Supplemental Braking System Without Using the Brake Lights
  • The InvisiBrake Supplemental Braking System, # RM-8700, will only activate when the tow vehicle brake lights are illuminated. This braking system has a connector that splices into the tow wiring setup on the towed vehicle and receives the signal from the brake light circuits. I have attached an image of the wiring diagram for the InvisiBrake Braking System. If the brake lights do not come on when you are only using the engine brake, then I would recommend the Blue Ox Patriot Proportional...
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  • What Lighting Functions Does a Tow Ready 4-Way Vehicle Wiring Harness Provide
  • Trailer wiring harness # 118551 will provide the basic light functions: left and right turn signals, brake lights, and running lights (tail lights). It will not provide reverse lights which are not common on trailers in the US. If your trailer does have reverse lights then it likely has something other than a 4-Way flat connector. If you can tell me the type of trailer connector on the trailer and the specific year, make, and model of the vehicle I can make sure we get you the proper connector. If...
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  • Availability of Magnetic Lights For Use with Hitch-Mounted Cargo Carrier
  • You ask a good question. Any vehicle accessory, such as a hitch-mounted cargo carrier like # e98874, when installed and in use must not block the vehicle's various stop/turn/tail lights. In actual practice it is usually not the carrier itself that blocks the lights but the cargo that is loaded on it. A couple of large cartons loaded into this tray-style carrier could, on some vehicles, partially block the view of your lights for a motorist behind you. State laws and the degree of actual...
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  • Is Additional Lighting Needed When Using Demco Kar Kaddy SS Tow Dolly
  • Excellent question, and the lighting on the dolly is DOT compliant, so no additional lighting is needed when using the Kar Kaddy SS, which is the following part number: - Demco Kar Kaddy SS Tow Dolly with Disc Brakes # DM9713045 The dolly has the required brake lights, tail lights, turn signal lights, front fender marker lights and a license plate light; it connects to your motorhome via the dolly's 4-flat connector which activates the lights. The Kar Kaddy SS # DM9713045 is a superb...
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  • Does 4-Way Trailer Wiring Harness Have Reverse Light Feature
  • I can certainly help you with that. Since the Curt T-Connector Vehicle Wiring Harness, part # C55384 is a 4-way connector the four functions will be Yellow for the left turn and brake, Green is for right turn and brake, Brown is for running lights, and the White is the ground wire that gets attached to a clean metal surface. For the reverse light function you will need a 5-way trailer connector and you can use the fifth wire to attach to the reverse light circuit on your vehicle. You...
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  • What Color Are the LEDs That Come With the Roadmaster Tail Light Wiring Kit for Towed Vehicles
  • The Roadmaster Tail Light Wiring Kit for Towed Vehicles part # RM-152-LED comes with red LEDs which are needed because with LEDs you must use a bulb color that matches that of the tail light housing in order to get a true color. The bulb type that is used is indeed an 1157 so there would be different intensities based on if the stop or tail lights were activated. Please note, the Replacement LED Bulbs and Sockets part # RM-152-2 are just the replacement LEDs for the Roadmaster Tail Light...
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  • Which Wire Is For The Reverse Lights On 2001 Dodge Grand Caravan
  • The wiring colors on vehicles can vary from different vehicle years, makes and models. To determine which wire is the reverse light wire on your 2001 Dodge Grand Caravan you will need to use a circuit tester, part # PTW2993 to determine the wire function. You will need someone to assist you in this process. Have someone turn the key of your 2001 Dodge Grand Caravan to the on position so that there is power to the vehicle, the engine does not need to be running. Then, have them engage...
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  • Reverse Light Wire Color on a 1996 Chevrolet K1500 Pickup to Allow Connection of Back Up Light
  • The best way to confirm which wire activates your vehicle reverse lights is to remove one taillight assembly and visually identify which lead goes to the reverse light bulb. To remove the taillight, open the tailgate and locate and remove the two taillight retaining screws. This will allow you to pull out the taillight assembly for access to the wiring. Then, for safety sake, it will be useful to have a helper turn the ignition to the on position without starting the vehicle. Then place...
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  • Why Does the T-1 Wiring Harness for 2008 Dodge Grand Caravan Have to Draw Power From the Battery
  • The actual voltage to power the trailer lighting is drawn from the fused 12-volt feed that is ran to the battery. The connections that attach inline behind the tail lights provide the signal that tells the trailer lights when to activate. This has the benefit of isolating the voltage that powers the trailer lights from the wiring system that powers the tail lights on your Grand Caravan. A short circuit on the trailer wiring can blow the fuse on the power circuit at the battery or possibly...
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  • Removing Diodes From Lighting Used For Flat-Towing 2003 Acura TL
  • In order to remove the diodes from your Acura, you can do a couple things. If you want to remove the wiring harness altogether, simply trace the wires from the connector at the front of your Acura and find each diode used for your vehicle. The diode should be installed very near the tail lights. Use a circuit tester like part # 3808 and find the wire that shows current only when the left turn signal is used. Remove the diode and then use a connector to reattach the wires that the diode...
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  • Vehicle Wiring Harness Functionality For a 2017 Toyota Tacoma
  • With the Curt T-Connector Vehicle Wiring Harness # C56349 installed on your 2017 Toyota Tacoma your truck lights will continue to function at all times. The powered converter draws power from the vehicle wiring to send to the trailer tail lights. This will protect your factory wiring by not pulling excessive power through the wiring. When a trailer is not connected there is no power sent to the 4-way as there is not a complete circuit to power. If the converter were to become damaged...
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  • Is the Roadmaster Brake-Lite Relay Kit for Towed Vehicles Needed for a 2015 Chevy Equinox
  • The Roadmaster Brake-Lite Relay Kit for Towed Vehicles part # RM-88400 is NOT required for a 2015 Chevrolet Equinox. The vehicle has combined stop and turn signals which means the relay is not required per Roadmaster.
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  • Tail Lights Covered By Bike Rack Solution
  • The lights on the Demco Tow Lights w/ Wiring Harness # DMKKLB do not adjust from the vertical 180° position. The feet on # DMKKLB do adjust positions left and right for different angles. I recommend using the Roadmaster Standard Magnetic Tow Lights # RM-2120 to alleviate your blocked tail lights. The harness plugs into your 4 way flat trailer harness and uses magnetism to secure to the back of your vehicle. If you have nothing for the magnets to stick too, you can use # 3378895404 to fix...
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  • Does T-One Vehicle Wiring Harness 118384 have Combined Brake Light and Turn Signal Functions
  • Tow package wiring on a vehicle is already converted to combine the brake and turn signal lights onto the same circuit which is what trailers use. Wiring harness # 118384 Tees in line with the factory 7-Way wiring and provides a 4-Way flat connector in addition to the factory 7-Way so when using it the brake and turn signal lights will also be on the same circuits.
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  • What is The Purpose Of The Power Module On The Tow Harness For a 2023 Hyundai Santa Fe?
  • The Curt T-Connector Vehicle Wiring Harness # CU94FR which is plug and play for your 2023 Hyundai Santa Fe has a powered converter module and is compatible with your all LED lighting. This powered module serves 2 purposes. First it combines the separate brake light and turn signal wiring into a combined system used on trailers. It also reduces the amount of strain put on the factory wiring by sending power from the vehicle battery to the trailer lights. This is important since the tail...
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