January 2, 201511 yr 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
January 3, 201511 yr 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, 201511 yr by Gloyale
January 4, 201511 yr Author 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
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