49 Electrical connector parts are listed for the 2026 Ram 2500, in 13 part types, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The connector system on the 2026 Ram 2500 supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. The largest groups are Trailer Connector (13 parts), Headlamp Wiring Harness / Connector (10 parts) and Body Wiring Harness / Connector (5 parts). The other 10 part types cover the remaining 21 parts.
The 2026 Ram 2500 was sold with both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. 30 parts fit every engine; the other 19 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 Ram 2500 electrical connector parts are MOPAR (32 parts), CURT (16 parts) and DORMAN (1 part).
3 parts on this 2026 Ram 2500 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including CURT 55415 (Trailer Connector) and CURT 56415 (Trailer Connector). Click any part number to see every vehicle that part fits.
Body Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2026 2500 engines | 68606133AA | 🇺🇸 US 🇨🇦 CA | Fits Delete Box, Rrview Autodim Digital Display Mirror | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68646392AA | 🇺🇸 US 🇨🇦 CA | Fits Delete Box, Trailer Tire Pressure Monitoring SystemCrew Cab | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68646850AB | 🇺🇸 US 🇨🇦 CA | Camera | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68647082AA | 🇺🇸 US 🇨🇦 CA | Fits Rear View Auto Dim Mirror Digital 3.0Crew Cab Wheelbase 2 | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68647105AA | 🇺🇸 US 🇨🇦 CA | Tail Lamp | View on Amazon |
This table covers the body-harness connectors and pigtails. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
5 Body Wiring Harness / Connector parts for the 2026 Ram 2500 come from MOPAR. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.
Part numbers include MOPAR 68606133AA, MOPAR 68646392AA and MOPAR 68646850AB, among others listed above.
Diesel Exhaust Fluid (DEF) Pump Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 57009258AA | 🇺🇸 US 🇨🇦 CA | Urea Tank Harness | View on Amazon |
This table covers the wiring-harness connectors at the Diesel Exhaust Fluid (DEF) Pump. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
This group shows a single part: MOPAR 57009258AA.
Door Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2026 2500 engines | 68647401AB | 🇺🇸 US 🇨🇦 CA | Rear Door Wiring | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68647402AA | 🇺🇸 US 🇨🇦 CA | Rear Door Wiring | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68647501AB | 🇺🇸 US 🇨🇦 CA | Rear Door Wiring | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68647502AA | 🇺🇸 US 🇨🇦 CA | Rear Door Wiring | View on Amazon |
This table covers the wiring-harness connectors at the Door. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
4 Door Wiring Harness / Connector parts for the 2026 Ram 2500 come from MOPAR. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.
This group includes MOPAR 68647401AB, MOPAR 68647402AA and MOPAR 68647501AB and the remaining parts above.
Engine Block Heater Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 68676777AA | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineEngine Block Heater | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68677893AA | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineEngine Block Heater | View on Amazon |
This table covers the harness connectors at the Engine Block Heater. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
MOPAR supplies both parts for the 2026 Ram 2500.
Listed part numbers: MOPAR 68676777AA and MOPAR 68677893AA.
Engine Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 68648503AE | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineElectric Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68648504AE | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineDual Alternators Rated At 400 Amps, Electric Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68649501AE | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineExc. Dual Alternators Rated At 400 Amps | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68649502AF | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineDual Alternators Rated At 400 Amps | View on Amazon |
This table covers the wiring-harness connectors at the Engine. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
4 Engine Wiring Harness / Connector parts for the 2026 Ram 2500 come from MOPAR.
Listed part numbers: MOPAR 68648503AE, MOPAR 68648504AE and MOPAR 68649501AE, plus the other parts above.
Headlamp Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 68646855AC | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineRemote Start System, Front Disconnecting Stabilizer Bar, Electric Shift-On-The-Fly Transfer Case, TRU-LOK Front & Rear Axles | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68646857AC | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineRemote Start System, Surround View Camera System, Front Disconnecting Stabilizer Bar, Electric Shift-On-The-Fly Transfer Case, TRU-LOK Front & Rear Axles | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68646858AC | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineElec Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68646860AB | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineSurround View Camera System, Elec Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68646862AB | 🇺🇸 US 🇨🇦 CA | Fits HEMI HD EngineRemote Start System | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68646869AC | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineElec Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68646875AB | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineSurround View Camera System, Elec Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68646877AB | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineRemote Start System | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68646878AB | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineRemote Start System, Elec Shift-On-The-Fly Transfer Case | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68646879AB | 🇺🇸 US 🇨🇦 CA | Fits Cummins engine HO EngineRemote Start System, Surround View Camera System | View on Amazon |
This table covers the wiring-harness connectors at the Headlamp. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
10 Headlamp Wiring Harness / Connector parts for the 2026 Ram 2500 come from MOPAR.
Steering Wheel Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2026 2500 engines | 68716779AA | 🇺🇸 US 🇨🇦 CA | Fits Luxury Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with Stop, Instrument Panel Bezels-Painted W Hydrographics or Instrument Panel Bezels-PaintedExc. Heated Steering Wheel | View on Amazon |
| MOPAR Fits: all 2026 2500 engines | 68716781AA | 🇺🇸 US 🇨🇦 CA | Fits 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Adaptive Cruise Control with StopExcept Steering Wheel Mounted Audio Controls or Cluster 12" TFT Color Display | View on Amazon |
This table covers the harness connectors at the Steering Wheel. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
MOPAR supplies both parts for the 2026 Ram 2500. All of them fit every engine offered in the 2026 2500.
Part numbers include MOPAR 68716779AA and MOPAR 68716781AA.
Trailer Adapter Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2026 2500 engines | 57101 | 🇺🇸 US 🇨🇦 CA | 7-Way Round RV To 4-Way Flat Adapter | View on Amazon |
This table covers the harness connectors at the Trailer Adapter. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2026 Ram 2500 — CURT 57101.
Trailer Brake Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2026 2500 engines | 51446 | 🇺🇸 US 🇨🇦 CA | Brake Control Adapter Harness | View on Amazon |
This table covers the harness connectors at the Trailer Brake Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2026 Ram 2500 — CURT 51446.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Popular Fits: all 2026 2500 engines | 55415 | 🇺🇸 US 🇨🇦 CA | Replacement 7-Way RV Blade OEM Socket | View on Amazon |
| CURT Popular Fits: all 2026 2500 engines | 56415 | 🇺🇸 US 🇨🇦 CA | Replacement 7-Way RV Blade OEM SocketTwist-In | View on Amazon |
| CURT Popular Fits: all 2026 2500 engines | 56229 | 🇺🇸 US 🇨🇦 CA | 7-Way USCAR Electrical ConnectorLength: 24 in. | View on Amazon |
| CURT Fits: all 2026 2500 engines | 55416 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Replacement OEM 7-Way RV Blade SocketPlugs Into USCAR Socket | View on Amazon |
| CURT Fits: all 2026 2500 engines | 55515 | 🇺🇸 US 🇨🇦 CA | Custom Wiring ConnectorOE 4-Way Flat | View on Amazon |
| CURT Fits: all 2026 2500 engines | 56515 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Connector5-Way Flat | View on Amazon |
| CURT Fits: all 2026 2500 engines | 57015 | 🇺🇸 US 🇨🇦 CA | OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket | View on Amazon |
| CURT Fits: all 2026 2500 engines | 55384 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Connector4-Way Flat | View on Amazon |
| CURT Fits: all 2026 2500 engines | 57020 | 🇺🇸 US 🇨🇦 CA | OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged | View on Amazon |
| CURT Fits: all 2026 2500 engines | 55774 | 🇺🇸 US 🇨🇦 CA | OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way | View on Amazon |
| CURT Fits: all 2026 2500 engines | 56584 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Harness5-Way Flat | View on Amazon |
| DORMAN Fits: all 2026 2500 engines | 924611 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MOPAR Fits: all 2026 2500 engines | 68573359AA | 🇺🇸 US 🇨🇦 CA | Fits Exc. Surround View Camera SystemExcept Trailer Camera Wiring/No Camera | View on Amazon |
This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
13 Trailer Connector parts for the 2026 Ram 2500 come from 3 brands — CURT, DORMAN and MOPAR. The "Popular" part is CURT 55415. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.
Trailer Extension Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2026 2500 engines | 56475 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Harness Extension | View on Amazon |
| CURT Fits: all 2026 2500 engines | 56070010 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Harness Extension7 ft. | View on Amazon |
| CURT Fits: all 2026 2500 engines | 56000010 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Harness ExtensionPack of 10 | View on Amazon |
This table covers the harness connectors at the Trailer Extension. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
CURT supplies the 3 Trailer Extension Connector parts for the 2026 Ram 2500. All of them fit every engine offered in the 2026 2500.
This group includes CURT 56475, CURT 56070010 and CURT 56000010.
Transmission-Automatic Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68647713AD | 🇺🇸 US 🇨🇦 CA | automatic | View on Amazon |
| MOPAR Fits: 6.7L L6 DIESEL Turbocharged | 68648712AD | 🇺🇸 US 🇨🇦 CA | automatic | View on Amazon |
This table covers the wiring-harness connectors at the Transmission-Automatic. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
2 Transmission-Automatic Wiring Harness / Connector parts for the 2026 Ram 2500 come from MOPAR.
This group includes MOPAR 68647713AD and MOPAR 68648712AD.
USB / AUX Port Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2026 2500 engines | 68480124AB | 🇺🇸 US 🇨🇦 CA | Hub Media CenterHDMI USB & AUX | View on Amazon |
This table covers the harness connectors at the USB / AUX Port. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2026 Ram 2500 — MOPAR 68480124AB.
Buying Electrical Connector Parts for a 2026 Ram 2500
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Some electrical connector parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Trailer Connector and Headlamp Wiring Harness / Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2026 Ram 2500?
Our catalog currently lists 49 electrical connector parts for the 2026 Ram 2500 across 13 subcategories and 3 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2026 Ram 2500 engines?
Some do. 30 parts fit every engine; the other 19 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 2026 Ram 2500?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2026 Ram 2500 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2026 Ram 2500?
First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2026 Ram 2500
Electrical Connector Parts for Other Ram 2500 Years
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