my 1990 f150 5.8 l e40d has a data link in the usual spot under the hood and I noticed there is also one hanging under the dash on the driver side near gas pedal. There is a bronze colored box that kinda looks like the eec with some bare prongs showing that look like the data link should be plugged in to these prongs cant really see how many prongs there are but im pretty sure this is where the data link hooks in. Is this right?

 

As far as I know, the only diagnostic wiring in the cab is by the parking brake pedal for the rear ABS. I'm not sure what is hanging down, but I'm pretty sure it is not anything to do with reading codes from the engine computer.

 

The plug under the dash is probably the door buzzer, if yours doesn't work right now and want to find out why everybody unplugs them just plug it back in.

 

does the door buzzer plug look exactly like the diagnostic data link under the hood cause this plug is exactly the same as that

 

Ford Fuel Injection » How To Run a Self-Test here is what the OBD1 connectors look like. Are you sure it is the same?

 

this is what it looks like just hanging there

 

and this is where it looks like it plugs into under the dash to the right of the gas pedal

 

how do I get the pics bigger

 

https://www.ford-trucks.com/forums/p...649736&thumb=1

nope didnt work wtf?