In general the wiring harnesses itself will never get a short or have a open within the harness unless its been in a fire or had mechanical damage done to the harness. Sometimes the harness may experience wire fatigue breakage when the harness is subjected to being constantly flexed back and forth.
The harness connectors sometimes fail due to mechanical damage or they become faulty because of corrosion and rust within the connector itself causing the contact pins to no longer carry a signal to the other modules.
So start by first inspecting the wiring harness and connectors for obvious damage or the connector just being loose. If the connectors and the harness passes the inspection then maybe you have a faulty computer module. But before even doing that make sure the battery and the charging system are good and supplying the proper voltages to the various modules.
Lost Communication with ECM/PCM "A"
Lost Communication with TCM
Lost Communication With Transfer Case Control Module
Lost Communication With Gear Shift Control Module A
Lost Communication With Cruise Control Module
Lost Communication With Fuel Injector Control Module
Lost Communication With Glow Plug Control Module 1
Lost Communication With Throttle Actuator A Control Module
Lost Communication With Alternative Fuel Control Module
Lost Communication With Fuel Pump Control Module A
Lost Communication With Exhaust Gas Recirculation Control Module A
Lost Communication With Exhaust Gas Recirculation Control Module B
Lost Communication With Turbocharger/Supercharger Control Module A
Lost Communication With Turbocharger/Supercharger Control Module B
Lost Communication With Reductant Control Module
Lost Communication With Air Conditioning Control Module
Lost Communication With Drive Motor Control Module A
Lost Communication With Battery Energy Control Module A
Lost Communication With Battery Energy Control Module B
Lost Communication With Emissions Critical Control Information
Lost Communication With Four-Wheel Drive Clutch Control Module
Lost Communication With PTO Control Module
Lost Communication With Fuel Additive Control Module
Lost Communication With Fuel Cell Control Module
Lost Communication With Exhaust Gas Sensor Module A
Lost Communication With Rocker Arm Control Module A
Lost Communication With Rocker Arm Control Module B
Lost Communication With All Wheel Drive Control Module
Lost Communication With Throttle Actuator B Control Module
Lost Communication With V2X Module
Lost Communication With Starter / Generator Control Module
Lost Communication With Anti-Lock Brake System (ABS) Control Module A
Lost Communication With Vehicle Dynamics Control Module
Lost Communication With Yaw Rate Sensor Module
Lost Communication With Lateral Acceleration Sensor Module
Lost Communication With Multi-axis Acceleration Sensor Module A
Lost Communication With Steering Angle Sensor Module
Lost Communication With Tire Pressure Monitor Module
Lost Communication With Park Brake Control Module
Lost Communication With Brake System Control Module A
Lost Communication With Chassis Control Module A
Lost Communication With Chassis Control Module B
Lost Communication With Active Vibration Control Module
Lost Communication With Generator A Control Module
Lost Communication With Camshaft Position Control Module
Lost Communication With Generator B Control Module
Lost Communication With Steering Effort Control Module
Lost Communication With Power Steering Control Module A
Lost Communication With Suspension Control Module A
Lost Communication With Active Roll Control Module
Lost Communication With Power Steering Control Module
Rear
Lost Communication With Differential Control Module
Front
Lost Communication With Differential Control Module
Rear
Lost Communication With Trailer Brake Control Module
Lost Communication With All Terrain Control Module
Lost Communication With Suspension Control Module B
Lost Communication With Accelerator Pedal Module
Lost Communication With Vacuum Sensor A
Lost Communication With Vacuum Sensor B
Lost Communication With Pedestrian Alert Control Module
Lost Communication With Body Control Module
Lost Communication With Body Control Module A
Lost Communication With Body Control Module B
Lost Communication With Body Control Module C
Lost Communication With Body Control Module D
Lost Communication With Body Control Module E
Lost Communication With Serial Data Gateway Module A
Lost Communication With Serial Data Gateway Module B
Lost Communication With Serial Data Gateway Module C
Lost Communication With Serial Data Gateway Module D
Lost Communication With Battery Energy Control Module C
Lost Communication With Hybrid/EV Battery Inductive Charging Module
Lost Communication With Battery Energy Control Module D
Lost Communication with Mirror Control Module B
Lost Communication With Multi-axis Acceleration Sensor Module B
Lost Communication With Serial Data Gateway Module E
Lost Communication With Restraints Control Module
Lost Communication With Side Restraints Control Module
Left
Lost Communication With Side Restraints Control Module
Right
Lost Communication With Restraints Occupant Classification System Module
Lost Communication With Instrument Panel Cluster (IPC) Control Module
Lost Communication With Information Center A
Lost Communication With Information Center B
Lost Communication With Head Up Display
Lost Communication With Parking Assist Control Module A
Lost Communication With Anti-Lock Brake System (ABS) Control Module B
Lost Communication With Power Steering Control Module “B”
Lost Communication With Automated Driving System Control Module A
Lost Communication With Automated Driving System Control Module B
Lost Communication With Automated Driving System Interface Module “A”
Lost Communication With Automated Driving System Interface Module “B
Lost Communication With Audible Alert Control Module
Lost Communication With Compass Module
Lost Communication With Navigation Display Module
Lost Communication With Navigation Control Module
Lost Communication With HVAC Control Module
Lost Communication With HVAC Control Module
Rear
Lost Communication With Auxiliary Heater Control Module
Lost Communication With Vehicle Immobilizer Control Module
Lost Communication With Vehicle Security Control Module
Lost Communication With Sunroof Control Module
Lost Communication With Global Positioning System Module
Lost Communication With A/C Compressor Control Module
Lost Communication With Fuel Pump Control Module B
Lost Communication With Exhaust Gas Sensor Module B
Lost Communication With Restraints System Sensor A
Lost Communication With Restraints System Sensor B
Lost Communication With Restraints System Sensor C
Lost Communication With Restraints System Sensor D
Lost Communication With Restraints System Sensor E
Lost Communication With Restraints System Sensor F
Lost Communication With Restraints System Sensor G
Lost Communication With Restraints System Sensor H
Lost Communication With Restraints System Sensor I
Lost Communication With Restraints System Sensor J
Lost Communication With Restraints System Sensor K
Lost Communication With Restraints System Sensor L
Lost Communication With Restraints System Sensor M
Lost Communication With Restraints System Sensor N
Lost Communication With Seat Belt Pretensioner Module A
Lost Communication With Seat Belt Pretensioner Module B
Lost Communication With Automatic Lighting Control Module
Lost Communication With Headlamp Leveling Control Module A
Lost Communication With Lighting Control Module
Front
Lost Communication With Lighting Control Module
Rear A
Lost Communication With Radio
Lost Communication With Antenna Control Module
Lost Communication With Audio Amplifier A
Lost Communication With Digital Disc Player/Changer Module A
Lost Communication With Digital Disc Player/Changer Module B
Lost Communication With Digital Disc Player/Changer Module C
Lost Communication With Headlamp Leveling Control Module B
Lost Communication With Digital Disc Player/Changer Module D
Lost Communication With Television
Lost Communication With Personal Computer
Lost Communication With Digital Audio Control Module A
Lost Communication With Digital Audio Control Module B
Lost Communication With Subscription Entertainment Receiver Module
Lost Communication With Entertainment Control Module
Rear A
Lost Communication With Telephone Control Module
Lost Communication With Telematic Control Module
Lost Communication With Door Control Module A
Lost Communication With Tachograph Module
Lost Communication With Battery Charger Control Module A
Lost Communication With Glow Plug Control Module 2
Lost Communication With Direct Ozone Reduction Catalyst Temperature Sensor
Lost Communication With Transmission Range Control Module
Lost Communication With Engine Coolant Pump Control Module
Lost Communication With Hybrid/EV Battery Interface Control Module A
Lost Communication With Hybrid/EV Battery Interface Control Module B
Lost Communication With Hybrid/EV Battery Interface Control Module C
Lost Communication With Hybrid/EV Battery Interface Control Module D
Lost Communication With Hybrid/EV Battery Interface Control Module E
Lost Communication With Hybrid/EV Battery Interface Control Module F
Lost Communication With Hybrid/EV Battery Interface Control Module G
Lost Communication With Hybrid/EV Battery Interface Control Module H
Lost Communication With Hybrid/EV Battery Interface Control Module I
Lost Communication With Hybrid/EV Battery Interface Control Module J
Lost Communication With Hybrid/EV Battery Interface Control Module K
Lost Communication With Hybrid/EV Battery Interface Control Module L
Lost Communication With Hybrid/EV Battery Interface Control Module M
Lost Communication With Hybrid/EV Battery Interface Control Module N
Lost Communication With Hybrid/EV Battery Interface Control Module O
Lost Communication With Hybrid/EV Battery Interface Control Module P
Lost Communication With Battery Monitor Module
Lost Communication With Particulate Matter Sensor B
Lost Communication With Planetary Gear Set Control Module
Lost Communication With Brake Blending Actuator
Lost Communication With Brake System Control Module B
Lost Communication With Catalyst Heater Control Module
Lost Communication With Fuel Heater Control Module
Lost Communication With Switch Input Module “A”
Lost Communication With Switch Input Module “B”
Lost Communication With Switch Input Module “C”
Lost Communication With Park Lock/Pawl Control Module
Lost Communication With Battery Charger Control Module B
Lost Communication With Charge Air Cooler Coolant Pump B
Lost Communication With DC/DC Converter Control Module C
Lost Communication with Drive Motor A Clutch Actuator
Lost Communication with Battery Management Control Module
Lost Communication With Door Control Module B