Possible short in OBD harness?

[jsnow36318]

When I plug my scan tools into my truck, doesn't matter which one either the reader can't read the truck or the truck radio goes into a reboot loop, I shot some video so if anyone has any ideas I'm open to it all.
I have a USB elm 327 that will connect to the truck but the readings go back and forth from min to max every refresh.

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[someotherguy]

I have not had any luck using those transparent blue mini-ELM327 devices on any GM truck. I had to get the nicer one, at about twice the price (but still dirt cheap, about $22 shipped) from BAFX Products - get it straight from their site to avoid counterfeits.

Some people have had limited success making the blue ones connect to a GM truck but it seems kinda random.

Not sure if that's the problem in your case but it may be that it's simply not compatible.

Richard

 

[deadbeat]

Even the BAFX only worked on 1 of my 2 1997's, good luck.

 

[jsnow36318]

Interesting. I've used both of these tools on my grandpa's 98 Yukon

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[df2x4]

As others have said, these trucks can be really picky about which adapters they'll connect to. I have two of the cheap blue ELM327 bluetooth adapters, they each only work with one of my '97 trucks. I had a BAFX that wouldn't work with either. My PLX Kiwi is the only adapter that has worked flawlessly with every vehicle I've tried it in.

 

[grampadirt]

Try this...key off engine off,plug it in,then key on engine off.Let it pair with your pcm,once it has paired and reading your pcm then start your truck.That's how I read wifey's '99 burb.I also have an ELM327,larger one though.I can also use a laptop with a WiFi adapter I have.