Wow this is like the 3rd thread of "I found it" the boy crying wolf story comes to mind.

Anyway did I see a request for pinout of the obdII port?

 

Glad to hear you found the issue, I was truely baffled on this one as was our hardware designer as neither of us had ever run into such an instance.

Talk about a needle in a haystack though it definitely would've had me at this point

I figured it was something in the obd2 port or wiring thereafter but I guess I'll keep our pins in mind next time as well, I guess you keep the obd2 cable connected to the obd2 port at all times & just plug in the interface when needed?

-Bill

 

Yeah, IF I was to ever take it to a dealer (which i need to for some recall stuff before they go bankrupt) I just take it out. But not anymore, I remove it now. LOL


Yeah cry wolf.......and yes...I am doing a call out for the OBD II wiring diagram. I guess I should use the search button and find my own damn threads huh?
https://www.performancetrucks.net/fo...d.php?t=373444

foff, can you tell me which pin on the OBD2 that damaged pin goes to? I'll continuity them out, but just curious if you had that info handy.




I would just like to see the wiring diagram for those pins.

 

Wow, that's pretty cool, seems so simple yet so hard to track down (as many electrical problems usually are). Seems like you have it "pinned" down now, pun intended

 

 

Hell no, I told him to burn the truck and start over.....

 

I told him the SAME thing!!!

 

I would just like to see the wiring diagram for those pins.[/QUOTE]

I found this in my archives, HTH

 

Well to answer your question. 4 and 5 are both grounds on different circuits.

Pin/Circuit #/Name
1 -- -- Not Used

2 PPL 1132 DLC Class 2 Serial Data

3 -- -- Not Used

4 BLK 1850 Ground

5 BLK/WHT 451 Ground

6-15 -- -- Not Used

16 ORN 640 Battery Positive Voltage

 

FYI
ckt 451 ends at G103, located at the right rear of the engine block, it has been known to have the wiring break inside the insulation at this location and cause some weird electrical issues

ckt1850 ends at G203 which is located at the drivers side a-pillar, behind the dash pad near the base of the windshield