Hopkins Endurance 4-Way Flat Trailer Connector - Trailer End - Ergonomic Design

Hopkins Wiring - HM48110

Heavy-duty 4-pole flat trailer connector features an over-sized grip to connecting quick and easy. Built-in cover helps keep terminals corrosion free.

Features:

• Easy pull, over-sized grip - makes connecting/disconnecting quick and easy
• Heavy-duty housing with dust cover protects the terminals
  • Housing also has mounting holes
• Terminal grease packet included
• 4-way flat connector (trailer side)
• Works with all 4-way flat connectors

Specs:

• Wires: 12" Long
• Pigtail leads
• Wire Configuration:
  • Yellow - left turn and brake
  • Green - right turn and brake
  • Brown - tail
  • White - ground

A heavy-duty mounting bracket holds the pistol-grip, 4-wire flat plug for a secure connection. The terminals are made of corrosion-resistant materials to withstand exposure to the elements.

48110 4-Wire Flat - Trailer Side

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Quick Fix(TM) 4 Pole Flat Trailer End$4.50

20 ft. Wishbone 4-Way Trailer Wiring Harness with 30" Ground Wire$9.95

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Ask the Experts about this Hopkins Wiring
Do you have a question about this Wiring?

• Troubleshooting Running Lights Not Working on an Enclosed Trailer
  
• The first thing I would check is the running light circuit on the truck side trailer connector to make sure a signal is getting through. Using a circuit tester like # 3808, and test the pin next to the covered ground pin. If the signal is getting through for the running lights then you know the problem is on the trailer side. if it is not, then you know the problem is on the truck side. If the problem is on the truck side, check to see if there is a trailer package running light fuse or relay
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• How to Connect the Ground Wire on a 4-Way Flat Wiring Harness
  
• The Hopkins Endurance 4-way Flat Trailer End Connector, # HM48110, that you referenced is the harness that goes on a trailer, not a vehicle. The 4-way connector for your vehicle is the Hopkins Endurance 4-Way Flat Vehicle End Connector, # HM48030. You can connect the white ground wire from the wiring harness to a vehicle ground, but you should verify that the white wire on your vehicle is in fact a ground wire. In most cases the white wire from the wiring harness is attached to a clean, bare
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• 4-Way Recommendation Where all 4 Wires are 16 Gauge
  
• I spoke with my contact at Hopkins and they informed me that the Hopkins Endurance 4-Way Flat Trailer Connector # HM48110 that you referenced has 16 gauge for the white (ground) wire and 18 gauge for the rest. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector # W787264.
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• Brake Lights on Trailer Do Not Work But All Other Lights Work
  
• The most likely problem is a bad ground. A bad ground will appear when there is more load on a system. In this case the brake lights which light up brighter and constant have more load than do turn signals or running lights. The first thing to check is the trailer connectors on the vehicle and trailer. Make sure they are clean and free of corrosion. That might be all it needs. If you still have problems then use a circuit tester like # 3808 if needed and check the functions on the vehicle sid
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