Expert Answers about Chevrolet Express Van

• 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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• 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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• Troubleshooting Noise Coming From the Rear of Vehicle When Turning Corners
• Sounds like the bushings that connect the sway bar to the vehicle's frame may be worn out. With the bushing worn out there will be extra slop and movement in the connection causing the noise when making your turns. I recommend replacing the sway bar and bushings. With worn out bushings, the bar may have started to wear on the busing ends and just replacing bushings may only put a band aid on the problem. Our sway bars from Roadmaster come compete with new bushings and all the hardware...
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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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• 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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• 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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• 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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• 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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• Trailer Brakes Shudder when Connected to 2004 Chevy Express Van But Not with Other Vehicles
• It sounds like an output and/or leveling issue on the brake controller. The manual override which you reported as working and not making the brakes shudder makes me think that it could be a problem related to the red wire. Check the red wires connection. It may need to be reattached in a different location if hardwired or cleaned out if it is a plug in application. Make sure that the brake controller is mounted as level as you can get it and set the leveling knob accordingly. Make sure...
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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 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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• Troubleshooting P3 Brake Controller that Reads No Connection When Connected to Trailer
• If your trailer is connected to your tow vehicle but the message on your P3 is telling you that a trailer is not connected the problem is most likely due to corrosion on either the 7-way on your vehicle or trailer. Clean both connectors well with fine grit sandpaper and see if that fixes the problem. Make sure the pin isn't bent also. The pin you are looking for is the 5:00 pin on the vehicle 7-way. There are some tests you can do to determine if this is the issue. I have included 2 links...
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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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• 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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• Troubleshooting a Primus Brake Controller part # TK90160 that Doesnt Activate With Brake Pedal
• It sounds like the stoplight circuit wire from the brake controller, (the red wire), isn't connected to a circuit that sees voltage when the brakes are applied. I would check the connection of the red wire to verify that it is connected correctly to the correct circuit. Typically this wire connects to the cold side of the brake pedal light switch. I also attached an FAQ on brake controller installs plus a video to show you how to troubleshoot your brake controller.
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• How to Test Trailer Wiring Harness with Parking Lights Always On on a 2006 Chevy Express Van
• It sounds as if your converter is shorted out. To check, you can test the brown wire going into the converter, no trailer connected, with a circuit tester, # PTW2993 if needed. You should not have power with the taillights off. Then check the brown wire coming out of the converter, if you have power with the taillights off then the converter has been shorted somehow and will need to be replaced. If the wiring harness functions normally with no trailer connected, then there is a problem...
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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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• Installed Hopkins Custom Fit Vehicle Wiring Harness, # 31345, On 2005 Chevy Express, No Brake Lights
• You might have a weak ground problem that is causing the brake lights not to work. The three areas where you will want to check to make sure you are getting a good ground is the ground wire from the converter in the wiring harness, the ground wire of the connector on the trailer and the trailer lights are grounded to the trailer. First, you will want to check the white wire on your wiring harness that is coming out of the converter. You want to make sure it is attached to a good, clean...
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