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Heater Box Electrical-Two Questions


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I have two heater box electrical questions, hopefully you could answer these questions for me. I removed my heater box some time ago and my tags have disappeared:




Is there a ground that attaches to the driver's side heater box mounting stud? There is a wire hanging from the dash that has an eyelet that coincidentally reaches that stud. 





What color wires go to which terminal on the front of the box? Up, down, and to the right. I have the male plug figured out.







72 2002tii 92-present

73 2002tii 90-92

78 530i 88-91

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That brown wire is your ground, bolts up where you thought. Mike mccarthy's book has a good picture of that connection of wires, and which goes where. I was trying to figure out the wiring order myself the other day, but haven't dug out the book. I'd you don't get an answer today, I'll dig out the book this weekend and can post the configuration. Good luck.

'71 colorado 2002

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What year is your car?



From my 69.  Note the brown ground terminal.





The heater box in the 73 has the wire colors labeled



here is the page from Mike Macartney's restoration book




Grounding point on the left side


Jim Gerock

Ruby Red 73tii built 5/30/73 "Celeste"

Riviera 69 2002 built 5/30/69 "Oscar"

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