68RFE Internal Wiring Harness 2015, used and ready to install. Fits the 68RFE. Ships fast from the USA.
If your 2015 Ram 2500 with the 6.7L Cummins and 68RFE is setting solenoid or speed sensor codes that come and go, dropping into limp mode over bumps, or acting up only in wet weather, the wiring may be the failure rather than anything inside the transmission. This listing is a used, genuine Mopar transmission wiring harness, part number 68237862AC, pulled from a 2015 Ram 2500 6.7L 68RFE 4x4. Despite the word internal in the title, this is the external harness that runs along the outside of the transmission, not a part that lives inside the case. Mopar catalogs 68237862AC as Wiring, Transmission, replacing 68237862AB, and lists it as discontinued new, which is why a clean used original is often the practical way to get one.
Everything the 68RFE does is directed by the transmission computer, and this harness is the path the signals take. It carries power and commands to the solenoid block through the pass-through connector on the case and brings back readings from the speed sensors and pressure switches. On a 2015 truck that pass-through is the gray connector; Transmission Digest identifies the gray solenoid assembly as the 2010-2018 design, after the overdrive solenoid was eliminated. The donor was a 4x4, and the source notes describe it as the transmission and transfer case harness, so it also serves the transfer case side of the drivetrain on four-wheel-drive trucks. The harness lives beside a hot transmission and exhaust and against brackets and crossmembers, so chafing and heat-cracked insulation are the usual killers.
Scan for codes with freeze frame, then wiggle-test the harness with the engine running while watching live data. A speed sensor reading that drops to zero when you flex the loom, or a solenoid code that sets when you move a connector, confirms a wiring problem. Check the connectors themselves for green corrosion and spread terminals, since cleaning a pin is cheaper than a harness. Our 68RFE speed sensor symptoms guide explains how a wiring fault mimics a dead sensor, and the shift solenoid testing guide shows how to separate a bad solenoid block from a broken circuit.
This harness came from a 2015 Ram 2500 with the 6.7L Cummins and 68RFE, four-wheel drive. Mopar lists 68237862AC for 2015 Ram 2500 6.7L diesel trucks across ST, SLT, Laramie and Longhorn trims in regular, crew and mega cab, 2WD and 4WD. Harness part numbers changed between model years and options, so the safest check is to match the number on the tag of your old harness, or send us your year and VIN before ordering. Other years, including an earlier 2008 harness, are on our 68RFE parts page.
| Fits | 68RFE 2015 |
| Part type | Internal Wiring Harness |
| Condition | Used |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the external Mopar transmission wiring harness, part number 68237862AC, that routes along the outside of the transmission. The internal solenoid wiring is part of the solenoid block assembly.
Mopar lists 68237862AC for 2015 Ram 2500 6.7L diesel trucks. Ram 3500 and other years can use different harness numbers, so match the number on your existing harness or send us your VIN before ordering.
The donor was a 4x4. Mopar lists this part number for both 2WD and 4WD 2015 Ram 2500 6.7L trucks, but confirm against the number on your harness, since option content can change the routing.
It is a used original removed from a 2015 Ram 2500. Check the photos for the exact connectors and loom condition, and inspect the connectors on your truck as well when you install it.
Multiple solenoid circuit codes setting together, or speed sensor codes that come and go with bumps, usually point to wiring. A single repeatable solenoid code with good wiring points to the solenoid block.
