Sponsored

Adding Tow Mirrors and new wiring harness killed my keyless entry keypad.

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
I have a 2025 Tremor. I added the keypad according to this thread. Everything went ok and the keypad was working as expected.

I later added the tow mirrors by following this. My truck did not have the plug for the extend switch, so I installed wiring harness RL3Z-14631-E. The connector for the keyless entry pad was not the same as the connector on the harness I was taking out. The wire colors matched, so I spliced them together, but it is not working. The keypad lights up, but I cannot lock or unlock the doors with the keypad. All other door functions work.

Does anyone know where I can get the wiring diagrams for a 2025 so I can see if I have to rearrange my connections?
Sponsored

 
OP
OP

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
These are some pictures of the connector that did not fit.

Ford F-150 Adding Tow Mirrors and new wiring harness killed my keyless entry keypad. 20250903_201032


Ford F-150 Adding Tow Mirrors and new wiring harness killed my keyless entry keypad. 20250903_201005


Ford F-150 Adding Tow Mirrors and new wiring harness killed my keyless entry keypad. 20250903_200955


Ford F-150 Adding Tow Mirrors and new wiring harness killed my keyless entry keypad. 20250903_201103
 
Last edited:
OP
OP

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
Both harnesses has 5 wires. The color of the wires are the same in both harnesses so I spliced color to color. The only difference is that the connector from the keyless entry pad does not fit the plug from the new harness (posted above.) It's too late for me to open the door tonight, but I can open it tomorrow to compare plugs. While I have it open, I'll check to make sure my splices are good.
 
OP
OP

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
The Forscan changes I made when I first installed it are still there. I did not try a BCM reset.
 
OP
OP

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
BCM reset did not work.

I think one of my splices is bad. All of the buttons light up when I unlock the door by grabbing the handle. It also lights up upon key press of all buttons except button 7/8. I'll recheck my splices tomorrow.
 
OP
OP

Confused

Member
Joined
Sep 3, 2025
Threads
1
Messages
20
Reaction score
8
Location
US
Vehicles
2025 F-150 Tremor
So, I think I figured it out. The keypad ordered from the keypad thread ( FL3Z-14A626-AH ) fit the wiring harness that came with the truck. That harness did not have the connector for the tow mirror power extend feature, so I ordered wiring harness RL3Z-14631-E. It looks like keypad RL3Z-14A626-AA has the connector that will fit the plug in the new harness.
Sponsored

 
 







Top