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MASTERCELL Input Map — Trader-01

Vehicle: 1996 F-250 Crew Cab System: Infinitybox NGX Status: In Progress Last Updated: 2026-02-01

MASTERCELL NGX Input Overview

The MASTERCELL reads switch inputs and sends commands to POWERCELLs over CAN. Inputs are low-current signal wires (typically 18-22 AWG) — the MASTERCELL doesn't carry load current.

Input Types: - Momentary: Button press (horn, washer) - Latching: On/off switch (headlights, aux) - Multi-position: Rotary or multi-throw (headlight switch park/head) - Analog: Variable signal (dimmer rheostat, if used)

Input Assignment Table

Input # Switch/Signal Type Wire Color Location Notes
LIGHTING
1 Headlight Switch - PARK Latching TBD Dash Parking lights, marker lights
2 Headlight Switch - HEAD Latching TBD Dash Enables low/high beam circuit
3 Dimmer - LOW BEAM Latching TBD Column/Floor Low beam select
4 Dimmer - HIGH BEAM Latching TBD Column/Floor High beam select, flash-to-pass
5 Turn Signal - LEFT Latching TBD Column Left turn/lane change
6 Turn Signal - RIGHT Latching TBD Column Right turn/lane change
7 Hazard Switch Latching TBD Dash/Column Overrides turn signals
8 Brake Pedal Switch Momentary TBD Pedal Brake lights (NC or NO?)
IGNITION
9 Key-On (ACC) Latching TBD Ign Switch Accessory position
10 Key-On (RUN) Latching TBD Ign Switch Run position — main power-on
11 Crank (START) Momentary TBD Ign Switch Starter relay trigger
POWERTRAIN SIGNALS
12 Reverse Signal Input TBD STU Control Pack Reverse lights trigger
13 Neutral Safety Input TBD STU Control Pack Starter inhibit (park/neutral only)
DRIVER CONTROLS
14 Horn Button Momentary TBD Steering Wheel Horn relay trigger
15 Wiper - LOW Latching TBD Column/Dash Wiper low speed
16 Wiper - HIGH Latching TBD Column/Dash Wiper high speed
17 Wiper - INT Latching TBD Column/Dash Intermittent (if equipped)
18 Washer Momentary TBD Column/Dash Washer pump trigger
VEHICLE STATUS
19 Parking Brake Switch Latching TBD Console/Floor Parking brake indicator
20 Door Ajar - Driver Momentary TBD Door jamb Dome light / warning
21 Door Ajar - Passenger Momentary TBD Door jamb Dome light / warning
22 Door Ajar - Rear Left Momentary TBD Door jamb Dome light / warning
23 Door Ajar - Rear Right Momentary TBD Door jamb Dome light / warning
AUXILIARY
24 Aux Lights - Light Bar Latching TBD Console Front light bar
25 Aux Lights - Pods Latching TBD Console Ditch/spot lights
26 Aux Lights - Rock Lights Latching TBD Console Underbody
27 Aux Lights - Rear Latching TBD Console Chase/work light
28 Air Compressor Latching TBD Console Onboard air
29 Diff Lock Front Momentary TBD Console If equipped
30 Diff Lock Rear Momentary TBD Console If equipped

Inputs NOT Going to MASTERCELL

These are handled by other controllers:

Switch/Signal Goes To Reason
TC Shift (2H/4H/4L) STU TC Controller Direct to transfer case controller
Window Up/Down (x4) inMOTION cells Door module handles windows
Door Lock/Unlock inMOTION cells Door module handles locks
Mirror Adjust TBD Pending Jay's answer — may need H-bridge
Window Lock (child) inMOTION or MASTERCELL Pending Jay's answer
Seat Heater/Cooler LeatherSeats module Direct to seat controller
HVAC Controls Vintage Air / inVIRONMENT Pending Jay's answer on dual control

Open Questions

Pending Infinitybox Response

  1. Driver door inputs: Can one inMOTION handle all driver door switches, or do some need to run back to MASTERCELL?

  2. Mirror control: Requires polarity reversal — does Infinitybox handle this or need separate relay board?

  3. inVIRONMENT + VA controls: Can both coexist?

Decisions Needed

Decision Options Notes
Dimmer switch location Column / Floor / Dash OEM column had floor dimmer
Headlight switch type OEM rotary / Toggle / Push-button Affects input wiring
Brake switch type NO or NC Need to verify OEM switch type
Wiper switch location Column / Dash Depends on column choice

Input Count Summary

Category Count Status
Lighting 8 Defined
Ignition 3 Defined
Powertrain 2 Defined
Driver Controls 5 Defined
Vehicle Status 5 Defined
Auxiliary 7 Draft — may change
Total Defined 30
Pending (door/mirror) ~5-8 Waiting on Jay

Wire Color Planning

Infinitybox harness uses standard colors. For custom runs, follow this scheme:

Function Recommended Color
Ignition (key-on) Pink or Red/White
Ground trigger Black
Headlight switch Yellow
Turn signals Light Green (L), Dark Green (R)
Brake Green or Red
Horn Light Blue
Wipers Dark Blue
Aux switches Orange, Purple, Gray, Brown

Next Steps

  1. Confirm MASTERCELL NGX total input count (verify spec sheet)
  2. Assign final input numbers after Jay's response on door inputs
  3. Choose headlight switch style → affects input wiring
  4. Choose dimmer switch location → column or floor
  5. Verify brake switch polarity (NO vs NC)
  6. Map wire colors to harness pig-tails