10R80 Internal Wiring Harness 2017-24, new and ready to install. Fits the 10R80. Ships fast from the USA.
A new internal wiring harness for the Ford 10R80 ten-speed, listed for 2017-2024 F-150, Expedition, Navigator, Mustang and Ranger applications. If your truck is throwing speed sensor or range sensor circuit codes that come and go, drops into a commanded neutral, or shows wild ratio readings on a scan tool while the clutches themselves are healthy, the wiring inside the case is one of the few remaining suspects. Rubbed insulation, a cracked connector lock or a leaking case pass-through can all produce faults that look like a failing transmission.
Every electrical signal the 10R80 depends on travels through this harness. Ford's workshop procedure splits it into two sections. The valve body section plugs into the torque converter clutch solenoid and the line pressure control solenoid, plus the park lock pawl solenoid on trucks that have one. The case section runs to the four speed sensors (turbine shaft, intermediate speed A, intermediate speed B and output shaft), the transmission range sensor, and the auxiliary fluid pump on vehicles with it. Both meet at the round case connector that passes through the transmission housing to the vehicle harness.
Sonnax explains that the four speed sensors are two-wire Hall-effect units supplied with about 9 volts. The controller compares their signals to calculate which gear it is actually in, so a broken or high-resistance wire does not just set a code; it can make the computer believe a clutch is slipping and command protective strategies.
Start outside the transmission. Inspect the vehicle harness and the case connector for fluid, bent pins and a loose locking arm, and check the module power and grounds. Then watch live data: Sonnax recommends viewing TSS, ISSA, ISSB and OSS alongside commanded gear and measured ratio. A sensor that drops to zero for an instant while the others hold steady points to a wiring or connector break, while a reading that is steady but in the wrong place points to sensors installed in each other's positions. GEARS Magazine warns that the 10R80's failure-management modes raise line pressure and freeze adaptives, which feels like a mechanical failure, so clear up electrical codes in every module first. Our 10R80 common problems guide and the F-150 shift problems guide help separate harness faults from hard-part failures.
This harness is listed for 10R80 transmissions from 2017-2024. Within that span Ford added equipment such as the auxiliary pump on auto start-stop models and the park lock solenoid on some vehicles, so harness branches can differ. Count the connectors and compare the routing and case plug with the photos and your old harness, match the Ford part number if you can read it, or send us your year and VIN to confirm. Browse the rest of the ten-speed lineup on our 10R80 parts page.
| Fits | 10R80 2017-24 |
| Part type | Internal Wiring Harness |
| Condition | New |
| 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.
It is listed for 10R80 transmissions from 2017 through 2024, which covers F-150, Expedition, Navigator, Mustang and Ranger applications. Because some vehicles add an auxiliary pump or park lock solenoid branch, compare connector count and routing with your old harness or send us your year and VIN.
No. In Ford's procedure the harness is replaced from underneath after the pan and main control valve body are removed. The case connector is pushed out through the housing with a special sleeve tool.
This is the wiring harness only. The speed sensors and range sensor plug into it, and the fluid temperature sensor sits in the valve body as a separate part in Ford's procedure, so reuse or replace those individually.
Not necessarily. Sonnax reports that a turbine speed sensor and intermediate speed A sensor installed in each other's locations after a repair sets P0716 quickly. Check sensor placement and live data before replacing wiring.
Refill with MERCON ULV, set the level at the fill plug with the fluid hot, clear codes, then perform the adaptive learning drive cycle so the TCM rebuilds its shift adaptives.
