Expert Answers about Chevrolet Express Van

• 12 Volt Power Not Working on 7-Way Trailer Connector on a 2003 Chevy 3500 Express Van
• On some GM vehicles, there are some additional connections that need to be made under the hood to provide the 12 volt power to the 7-Way. We usually see this on trucks but it is possible that the full-size vans and SUVs could have the same problem. I have included a link to an FAQ that will help. It is also possible that everything is hooked up under the hood but a fuse could just be missing or blown. You can consult the vehicle owners manual and/or the legend on the power distribution...
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• Troubleshooting Trailer Lights Not Working With 2019 Chevy Express Van
• I can give you a number of troubleshooting steps as it seems like there are lights everywhere not working, though it was difficult to differentiate exactly which ones so here the steps you'll need to take. The first thing to do is take a look at your owner's manual to your 2019 Chevrolet Express Van's owner's manual to locate any trailer fuses or relays and ensure they are all there and in working order. If they are, in order to determine the specific problem you will need to purchase...
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• Will Tekonsha Trailer Wiring Harness 118377 Short Out Vehicle Wiring If Trailer Has Short
• The T-One Vehicle Wiring Harness # 118377 that you referenced will not short out the vehicle wiring in the event of a trailer wiring short. It has circuit protection built into the harness. The converter box will short out and fail which would prevent the short from traveling up to the vehicle wiring.
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• Activating 7-Way 12 Volt Power Circuit of 2004 Chevy Express Van
• There's a connection under the hood of your 2004 Chevy Express Van that needs to be made to allow the 12 volt accessory circuit work on your 7-way. If you check out the install video and help article I attached you can see how to make these connections.
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• Troubleshooting No Signal on Brake Controller Pin of 7-Way on 2012 Coachmen Freelander
• If you are not receiving power to the pin in the 5 o'clock position when using the manual override on your brake controller then your wiring is either damaged or your brake controller needs to be replaced. To determine which part is the problem simply cut the brake controller output wire 6" away from your controller (typically a blue wire). Activate the manual override and use a tester like part # PTW2992 to see if it is sending out power. If it is then you have damaged wiring and you...
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• Troubleshooting New LED Lights on 2002 Chevy Express 3500 Causing Tekonsha Controller to Malfunction
• You are correct that load resistors like part # P230004C will fix your issue. I reached out to my contact at Horizon Global, who owns both Bargman and Tekonsha, and he said that it sounds like you have a current path in the mechanical switch system on your 2002 Chevy Express 3500 that is allowing some voltage with a little current back feed into the circuit. The load resistors will help to fix this problem.
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• No Power to my Trailer Lights on my 1999 Chevrolet Express Van
• Yes the converter box or wiring harness like the 4-Pole 60" Long Vehicle End part # 18002 needs to be grounded to complete the circuit and provide ground between the source of power and the trailer.
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• Display Flashes After Installing Curt TriFlex Brake Controller on a 2003 Chevy Express Van
• On the Curt TriFlex brake controller # C24VV the display will flash when in adjustment mode. The brake controller will always have power to it, even when the vehicle is turned off, but will go to sleep after several minutes of inactivity. If you adjust the controller and still get a flashing display then you may need to unplug the controller, wait a few minutes, and plug it back in. It is also a good idea to make sure the vehicle trailer connector is clean and free of corrosion inside,...
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• Will the Roadmaster Reflex Steering Stabilizer Help a 2006 Chevy Express Van with Death Wobble
• I spoke with my contact at Roadmaster and he informed me that the Roadmaster Reflex Steering Stabilizer # RM-RBK17-RSSC that you referenced would definitely help with the death wobble you are experiencing on your 2006 Chevy Express Van 2500. He recommended that you install a stiffer rear sway bar also.
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• How to Fix Rapid Flashing Blinkers on a 2004 Chevrolet Express After Switching to LED Lights
• I don't know how the lights affect the cruise control feature on your 2004 Chevy Express van; the two seem unrelated unless they are on the same fuse. But I can explain what is going on with the flashing lights. On some vehicles, if you switch to LED lights it sort of confuses the electrical system on the vehicle because LED lights draw much less power than incandescent lights. The vehicle basically behaves as if the bulb was burned out by rapidly flashing. This is called hyper flash...
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• Derale Atomic-Cool Remote Engine Oil Cooler # D15450 Thermostat not Turning Fan On
• I contacted Derale and they confirmed the thermostat on the Atomic-Cool Remote Engine Oil Cooler Kit # D15450 needs to be reading 180°F for the fan to turn on. They suggested to make sure you have everything installed correctly. This includes checking that you have the thermostat fitting installed on the inlet side of the oil cooler. Next, check the wiring for the thermostat switch. On the thermostat switch, one terminal should be wired to the positive wire coming from the electric fan...
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• Troubleshooting Power to Both Running Lights and Left Turn Circuit After Converting 4-Way to 7-Way
• The Hopkins Plug-In Simple Vehicle Wiring Harness # 31345 that you installed is a confirmed fit for your 2017 Chevy Express Van so we can rule the harness out as the problem. It sounds like you extended the wiring from the 4-Way harness to a 7-Way like the Hopkins # HM48470 that features a 4- and 5-Way connector as well. I recommend making sure that the connections inside the 7-Way match the appropriate functions. It's also possible that there is a short between the running lights circuit...
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• Will an Electric Trailer Brake Controller Affect the Brakes on a 2001 Chevy Express Van
• An electric trailer brake controller only receives electrical signals from the vehicle it is installed on so it would not affect the hydraulic brakes that are in vehicles like your 2001 Chevy Express. A vehicle's brakes behave differently when they are wet and new brakes are likely going to slightly drag a little more until they get worn in a little. If you continue to have brake problems I would take the van to a brake shop and have them look at it. But I can tell you that the brake controller...
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• Troubleshooting Weak Trailer Brakes
• I would check the main ground for the trailer. This is the wire that runs from the trailer connector to the trailer frame and provides the ground for the entire trailer. The ground strap may have come loose and now may not be strong enough to fully apply the trailer brakes. This could be a magnet wiring problem. It is unlikely that the magnets are bad on new assemblies, but if the wiring is not properly connected, it could cause problems. Check to see that the magnets are properly grounded...
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• Trailer Lights Do Not Work After Installing Trailer Wiring on a 2010 Chevy Express 3500 Van
• I an 99 percent certain that it is a ground problem. The circuit cannot be completed unless everything is properly grounded including the trailer connectors, the converter box, and all of the lights. Grounds should be attached to clean and corrosion free bare metal surfaces. I have included a link to our wiring FAQ for reference.
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• No Brake Lights with Harness Part # 18004 On a 1998 Chevy Express Van
• The 1998 Chevy van is considered a 3-wire system; it has separate turn signals and brake lights. Using the hardwire unit, 18004, is only tapping into the turn signals meaning you have no brake lights on the trailer. We recommend a custom T-One harness for this van, part #118335. This plugs in behind the taillight assemblies and provides a flat four pole trailer connector which will activate the running lights, turn signals and brake lights on the trailer.
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• Derale 32" High-Output, Electric Radiator Fan # D16934 Slows Idle on 2001 Chevy Express Van
• The sudden draw of 50 amps when fan # D16934 turns on will cause that momentary decline that you are experiencing. The higher the RPMs of the motor the less it will affect anything. You can certainly go to a higher capacity alternator but it is not 100 percent necessary provided the draw of the fan is not overdrawing the electrical system.
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• Trailer Lights Not Working when Connected to 2008 Chevy Express 2500 w/Factory Tow Package
• First we should make sure we have checked all of the fuses and relays related to the factory tow package wiring on your 2008 Chevy Express van. Under the hood there are the following fuses related to the tow package wiring: Location 8 = right stop lamp, trailer turn signal Location 16 = left stop lamp, trailer turn signal Location 35 = Trailer wiring (this is a very ambiguous description and just might be the culprit) Location 62 = Trailer wiring (see above) Oddly enough there isn't...
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• Low Output Numbers with Braking on Tekonsha Prodigy P2 Trailer Brake Controller
• The Tekonsha Prodigy P2 Trailer Brake Controller part # 90885 is proportional so you'll get a number relative to the speed/stopping force of the vehicle. For example, if you're just driving around town you may not see a high number on the display. If you still have this issue under heavy braking, it may just be as simple as adjusting the gain setting. This is shown in the install instructions which I have attached for you below. If all else fails, unplug the controller and let it sit for...
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• Troubleshooting Draw-Tite Brake Controller # 5504
• First, re-confirm that the controller wires are attached in the correct manner, as follows: The blue wire is the brake output circuit and will be run to the 7-way connector. The black wire is the 12 volt power wire that will be run through a 30 amp circuit breaker to the vehicle battery positive terminal.The white wire is the ground wire and will be attached to the battery negative terminal. The red wire will be run to the cold side of the brake light switch that only sees voltage when...
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