Install the F-150 D-Switch hub and wiring

Check the layout and the kit

DD8572

Mount-only kit

Already own a D-Switch? Add the vehicle-specific bracket, hardware and zip tie.

View this product

DD8783

Complete D-Switch kit

Start with the hub, controller, wiring and F-150 mounting bracket together.

View this product

The current product fitment extends to 2026; the manufacturer’s illustrated F-150 bracket procedure is titled 2021–2025. This guide covers the 2021–2023 ecosystem. Confirm the exact mounting points on later trucks rather than assuming the photographs match every engine bay.

2021 3.0L Power Stroke: supplier testing is not confirmed. Resolve clearance before ordering or disassembly.

For the F-150 bracket, have a trim tool, 10 mm socket, 10 mm wrench and 4 mm Allen key ready. The electrical/controller work can also require Phillips #1/#2 drivers, an 8 mm socket, T10 Torx driver and suitable connection tools. Drilling depends on the cab-controller mounting choice.

Follow the vehicle service procedure for safely isolating its 12V electrical supply before working on power connections. Plan protected cable routing away from heat, moving components, sharp edges and control or airbag systems. Do not connect to a hybrid drive battery. No F-150 signal pinout or mounting-fastener torque is supplied by these instructions.

F-150 mounting

Six steps to mount the bracket and hub

1. Release the harness clip

At the right side of the battery, remove the harness-retaining clip with a trim tool. Keep the harness clear of the bracket work.

2. Remove the reservoir bolt

Use a 10 mm socket to remove the coolant-reservoir mounting bolt shown in the photo. Retain this original bolt.

3. Locate the bracket flange

Slide the L-shaped bracket flange between the coolant reservoir and the original clip nut, then reinstall the retained factory bolt.

4. Secure the support leg

Use the supplied hardware, a 4 mm Allen key and 10 mm wrench to fasten the support leg to the battery tray where the harness clip was removed.

5. Retain the loose harness

Use the supplied zip tie to secure the released harness to the installed bracket.

6. Fasten the D-Switch hub

Secure the hub to the bracket with the supplied screw-and-nut hardware. Orient the harness connectors toward the firewall.

Mount the controller where it is easy to reach

Choose a visible, accessible location inside the cab. The universal bracket provides angle adjustment; a flush mount uses the four rear screw holes. Check behind the surface before any drilling.

The engine-bay bracket’s no-drill claim does not apply to these cab mounting choices.

Connect the battery cable and controller harness

1. With the electrical supply safely isolated, attach the included 4AWG cables to the hub’s labelled positive and negative terminal blocks. Match polarity.
2. The cables are directional: the 1/4-inch lugs go to the D-Switch and the 3/8-inch lugs go to the battery. Keep the positive cable’s fuse block near the battery. The current manual specifies a 125A fuse.
3. Route the cables through the hub-lid opening and connect them to the correct vehicle 12V battery terminals using the vehicle’s service procedure. Longer cables are required if the battery location is outside the engine bay.
4. Connect the controller harness to the 3-metre extension and route it to the hub harness. Align the arrows and DD logos on the M8 connectors; do not force them.
5. If needed, connect the hub harness’s white 4-pin connector to the hub. Its separate M8 branch connects to the accessory/sensor harness.

The diagram shows circuit relationships, not a complete F-150 cable-routing plan. Protect and secure the wiring, and retain access to the battery and fuse box.

Connect only verified 12V sensor signals

The accessory harness has five bare leads. These are low-current sense inputs, not accessory-power outputs. Verify the actual vehicle signal with a voltmeter; do not tap CAN, LIN, CXPI or another message-based circuit.

White

Ignition: follows vehicle ignition for controller operation.

Blue

Night Mode: changes controller illumination and can also be assigned to outputs.

Red

Programmable Sensor 1.

Black

Programmable Sensor 2. This black sense lead is not the main battery-ground cable.

Green

Programmable Sensor 3.

Connect the accessory harness to the hub harness with its aligned M8 connector. Use only the desired inputs and protect unused ends. The supplied quick splices are specified for 18–22 AWG wire: seat the sense lead in the stopped inner groove and the verified vehicle wire in the through groove, press the metal contact fully with pliers, tug-check both wires and close the latch. Use an appropriate connection method if the vehicle wire is outside that size range.

The manufacturer suggests a suitable parking-light or sidemarker 12V signal for Night Mode; this is not a claim that every F-150 lamp wire supplies a compatible signal.

Match each accessory to the correct output

Main outputs

Channels 1–4: 15A each. Channels 5–8: 30A each.

Backlight circuit

Eight connection positions on a separate bus, 15A total.

System maximum

125A total; individual channel limits still apply.

Electrical supply

12V vehicle accessories; operating range 9–16VDC.

Protection

Adjustable electronic channel limits plus a 125A fuse on the battery cable.

Weather resistance

IP67-rated hub/controller electronics, excluding wiring terminals.

Controller size

5.06 ×2.66 ×0.45 inches.

Hub size

8.33 ×6.26 ×1.79 inches.

1. Identify each accessory’s rated current, polarity and any required relay harness before connecting it.
2. Loosen the selected terminal counterclockwise with a Phillips screwdriver, route its bare leads through the base opening, and place them in the labelled positive (+) and negative (−) terminals.
3. Tighten clockwise until snug and gently tug-check each lead. Connect compatible accent/backlight leads to the separate backlight bus, respecting its 15A combined limit.
4. Use a suitable separately powered HD/UHD relay harness for a load above 30A. The harness aux-adapter replaces its toggle switch so the D-Switch controls the relay. Do not route that high load directly through a D-Switch output.

Relay-controlled loads are on/off only. Do not apply PWM dimming to a mechanical relay. Check compatible-load requirements before using any flashing or dimming function.

Finish with one circuit at a time

1. Check all mounting hardware, cable protection, polarity and connector seating. Close the hub and ensure terminals are protected.
2. Restore the vehicle 12V supply according to the service procedure.
3. Use the programming guide to label circuits, link buttons and set current limits within each channel’s rating.
4. Test each output individually, then verify ignition and any installed sensor functions. Confirm that lights used on public roads operate in an appropriate road setting.