OBD wire question

Hi. I am new to this forum. Thanks in advance for any help on this question. This is plugged into my OBD. The wire on this is disconnected and I cannot figure out what it is for and where it reconnects. I took my truck in to pass DEQ test and the guy said they couldn’t get a reading because there was no power to the OBD. I will replace the fuse. Any advice on this?

 

Looks like an aftermarket stereo OBD connection. I haven’t used one, but I’ve seen similar adapters in the wiring kits I’ve for installs I’ve done.

 

Thanks for that. I recently did purchase and have an aftermarket stereo put in, but it is unplugged yet the stereo works fine

 

It might just be part of the wiring kit. These typically contain pieces that are not needed depending on installation options. My more recent installs included maestro units, so they connected to the vehicle bus via that, hence no need for the OBD. Your install may be similar. If it’s not connected to anything and things are working, set it aside for a while and dispose when you’re ready.

 

Generally these are to provide data from the truck to the radio. Tire pressures ect to show on screen of the radio. This is the easiest way to get an external connection into the data network to ask the ECUs for data to display on the radio screen.

 

It’s either from the stereo or remote starter