 Engine Wiring Question, Use for specific wire |
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| damnfiknow |
 Apr 28 2010, 01:08 PM
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#1
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Member  Group: Members Posts: 77 Joined: 25-October 09 From: Texas Member No.: 10,980 Region Association: None  |
Changed out engine in 75 with one from a 73. Brought no FI with it. Using carb. Am using the engine compartment harness from the 73. I can figure out what goes to what, I think. Black and Black/Purple ones to the + of coil. Green/white to oil pressure unit and starter conections for the rest, except the white one. The question is the White Wire that shows to be the #12 of the 12 wire engine connector. Following the control board map show the circit going to the #13 of the 14 wire connector. What does this wire go to??????
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| Spoke |
Apr 28 2010, 01:20 PM
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#2
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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I believe the white wire goes to the supplementary air valve used in the FI system to get a higher idle at cold temperatures.
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| benalishhero |
Apr 28 2010, 04:25 PM
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#3
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Member Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States |
Yep, air valve wire.
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| underthetire |
Apr 28 2010, 05:01 PM
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#4
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
73 only has one wire on the + side of the coil. Think it's just the black/purple.
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| Cap'n Krusty |
Apr 28 2010, 05:32 PM
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#5
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
You guys better look at a wiring diagram. The black wire goes to (+), the green wire and the black/purple wire go to the (-) side of the coil. Black/purple is the tach wire.
The Cap'n |
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