Electrical Need help identifying what these electrical items are (93 LX 5.0)

Happy Saturday.

I was ripping out some aftermarket stuff in my car and I came across some items that I can't quite figure out. First issue - EEC wire, appears to be grey/red, and it was teed to what I believe was the wideband HEGO that was used for the Microsquirt (that I also took out). Page 29 of the EVTM shows pin 94 is DG/P (dark grey? / pink?) and I'm guessing it's the input from the passenger HEGO to the EEC. Any thoughts?







Second issue - I found this plug hanging out behind the radio. I can't remember if I've ever seen it before. I can't track it down in the wiring diagrams or EVTM. Anyone know what it's for?



Third - There's a blue box hanging out behind the radio. I can't track this one down in the wiring diagrams, either.




Thanks!
Dan

dan50 said:

Second issue - I found this plug hanging out behind the radio. I can't remember if I've ever seen it before. I can't track it down in the wiring diagrams or EVTM. Anyone know what it's for?

Click to expand...

I believe that this plug is for the warning chime module.

dan50 said:

Third - There's a blue box hanging out behind the radio. I can't track this one down in the wiring diagrams, either.

Click to expand...

Looks like this is the airbag diagnostic module. I was looking at the wiring diagrams for an 89... which is why I couldn't find it in the drawings.

dan50 said:

Happy Saturday.

I was ripping out some aftermarket stuff in my car and I came across some items that I can't quite figure out. First issue - EEC wire, appears to be grey/red, and it was teed to what I believe was the wideband HEGO that was used for the Microsquirt (that I also took out). Page 29 of the EVTM shows pin 94 is DG/P (dark grey? / pink?) and I'm guessing it's the input from the passenger HEGO to the EEC. Any thoughts?

Click to expand...

This is pin 46 to the ECU, Sensor Signal Return, 18 gauge, wire # 359 GY-R. This was the "Analog Negative -" from the AEM wideband O2 sensor. It was T tapped to the "shared signal ground" (AEM term), which the AEM document states to do if there isn't a differential analog input for logging or control in the ECM. There was an Analog Positive + from the AEM wideband to the pink O2 input wire on the Microsquirt.

Thank you everyone, especially AeroCoupe, for the help. Plan is to get this thing back on the road before winter.