 Unattached green wire beneath ECU, '73 1.7 |
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| jrmdir |
 Sep 6 2021, 11:15 AM
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Member  Group: Members Posts: 224 Joined: 13-May 21 From: Central Ohio Member No.: 25,544 Region Association: Upper MidWest 
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Hi: Another one of those mystery wire questions.
The large cable has the "big 4" red wires going from firewall to the battery. Small wire off to the right and through the paper towel goes to the fuel pump. The green wire spade lug appears to have formerly had a plastic casing. It's not "hot" with key on or off. Nor with any dash switches on. Any ideas what it is/was for? Thanks, Ron  |
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| Jonathan Livesay |
Sep 6 2021, 11:20 AM
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Senior Member Group: Members Posts: 741 Joined: 13-March 10 From: La Canada CA Member No.: 11,461 Region Association: None
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QUOTE(jrmdir @ Sep 6 2021, 10:15 AM)  Hi: Another one of those mystery wire questions. The large cable has the "big 4" red wires going from firewall to the battery. Small wire off to the right and through the paper towel goes to the fuel pump. The green wire spade lug appears to have formerly had a plastic casing. It's not "hot" with key on or off. Nor with any dash switches on. Any ideas what it is/was for? Thanks, Ron Temp. gauge? |
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| dlee6204 |
Sep 6 2021, 11:22 AM
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#3
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Howdy Group: Members Posts: 2,162 Joined: 30-April 06 From: Burnsville, NC Member No.: 5,956 |
(IMG:style_emoticons/default/agree.gif)
Oil temperature sensor. If your engine is equipped, a green/black wire would go from the temp sensor on the bottom of the engine behind the fan shroud, through the engine tin and plug into the spade terminal you have shown. Do you have a center console with gauges? |
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| jrmdir |
Sep 6 2021, 12:14 PM
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#4
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Member Group: Members Posts: 224 Joined: 13-May 21 From: Central Ohio Member No.: 25,544 Region Association: Upper MidWest
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Thanks - makes sense. I don't have the gauge/console package but sounds right that they would include the wiring for it in all looms.
Good to know that if I ever decide to add OT sensor I won't need to fish a new wire through the car! Cheers, Ron |
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