Using Aftermarket Devices in OEM-Connected Vehicles: Why You Should Avoid the OBD-II Port for Power
Overview
If your fleet uses OEM-Connected Telematics through Azuga, it’s important to understand how your hardware installation choices may affect vehicle performance and data accuracy.
Most vehicle manufacturers (OEMs), including Ford, Stellantis, and others, strongly advise against using the OBD-II port to power aftermarket hardware (like safetycams, ELDs, or GPS trackers) in OEM-connected vehicles.
Why It Matters
Using the OBD-II port for power can interfere with critical vehicle systems. This includes:
- Disruption to infotainment systems and telematics control units (TCUs)
- Loss or corruption of OEM data streams
- Impact to over-the-air (OTA) updates and remote vehicle commands
- Signal interference due to electrical noise from non-certified hardware
These systems are highly sensitive to electrical load and signal interference, which can be introduced when non-OEM devices draw power from the diagnostic port.
Best Practices for OEM-Connected Vehicles
If your vehicles are connected through an OEM integration, follow these installation guidelines:
Do not use the OBD-II port to power any aftermarket devices
Do use a clean, dedicated power source such as:
- A fuse tap
- An upfitter switch
- A hardwired telematics-grade harness
These methods reduce the risk of interference and maintain compliance with OEM recommendations.
Questions?
📧 Email: customercare@azuga.com
📞 Call: (888) 790-0715