angerthis Posted January 2, 2015 Share Posted January 2, 2015 Just curious there on the fuse box in the top picture That blue plug label diagnostic What is that for Because you pop the cover off you'll see in the second picture Its just a circuit board rather than any wiring plug And I dunno the bottom picture is of my diagnostic plugs Does anyone know what that would be for If I'm not making sense please let me know and I will try and reword it better if I can Link to comment Share on other sites More sharing options...
Gloyale Posted January 3, 2015 Share Posted January 3, 2015 (edited) The blue box is the Diode pack for several of the different circuits. Not a Diagnostic connector despite it's resemblence to the newer OBD II plug. The Green connectors are the "test" mode connectors....Puts the car in "D-check" mode...for checking relay, fuel pump, and code reading....as well as setting timing. The white ones could be the "Read" connectors...although I see 2 wires in them and I though they should be black....if there is a black pair up in there then the white ones are for something else...Maybe just a illumination connector for one of the swithces? the larger multi pin connectors are parallel legs of the MPFI circuits. Can probed to test for voltage, pulses, etc... I've got the FSM that outlines testing using them....but it's kinda a pain. Mostly they were used for line end checking of functions at the assembly plant. Edited January 3, 2015 by Gloyale Link to comment Share on other sites More sharing options...
Turbone Posted January 3, 2015 Share Posted January 3, 2015 I think the white plug resets the 60k engine check light. Maybe Link to comment Share on other sites More sharing options...
angerthis Posted January 4, 2015 Author Share Posted January 4, 2015 The blue box is the Diode pack for several of the different circuits. Not a Diagnostic connector despite it's resemblence to the newer OBD II plug. The Green connectors are the "test" mode connectors....Puts the car in "D-check" mode...for checking relay, fuel pump, and code reading....as well as setting timing. The white ones could be the "Read" connectors...although I see 2 wires in them and I though they should be black....if there is a black pair up in there then the white ones are for something else...Maybe just a illumination connector for one of the swithces? the larger multi pin connectors are parallel legs of the MPFI circuits. Can probed to test for voltage, pulses, etc... I've got the FSM that outlines testing using them....but it's kinda a pain. Mostly they were used for line end checking of functions at the assembly plant. I will post better pictures that way you can get a better visual of what they are tomorrow Link to comment Share on other sites More sharing options...
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