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Old Mar 16, 2026 | 09:48 AM
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Here another quiz Wiring ?
I have this hang off the driver side inner fender it’s a plug BUT I don’t know where or what it’s for.

 
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Old Mar 16, 2026 | 11:54 AM
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Do you have the windshield wiper pump/tank assembly in?
 
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Old Mar 16, 2026 | 12:21 PM
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Originally Posted by blue68f100
Do you have the windshield wiper pump/tank assembly in?
Nope. That maybe exactly what it is.
 
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Old Mar 16, 2026 | 12:59 PM
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Not sure on this but the chart shows the green wire with the black tracer to be for the head lamp dimmer switch to the high beams.
Ford-truck_wire-chart.gif (700×1093)

Let us know what you find out.
 
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Old Mar 16, 2026 | 06:32 PM
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Originally Posted by Green72F250
Not sure on this but the chart shows the green wire with the black tracer to be for the head lamp dimmer switch to the high beams.
Ford-truck_wire-chart.gif (700×1093)

Let us know what you find out.
Is this chart part of a 68 shop manual ?
 
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Old Mar 16, 2026 | 07:14 PM
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It's found here near the bottom of the page under Misc. Wiring and Schematic Diagrams. Ford truck wire and gauge chart.

Ford Truck Technical Drawings and Schematics - Section H - Wiring Diagrams
 
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Old Mar 16, 2026 | 11:56 PM
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Very helpful chart thanks
 
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Old Mar 17, 2026 | 05:38 PM
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He said this in under the hood, inner finder location. NOT under the dash.
 
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Old Mar 18, 2026 | 06:53 AM
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Figured it out it is the windshield washer pump wiring. Had the wifey it in the truck and turned the ignition on and told her to push the windshield wiper **** and I had a test light and BINGO it lite up everytime she pushed the button. Now I just need to get all the stuff to make it work. My truck doesn’t even have the squirters or the water bag.
 
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Old Mar 18, 2026 | 07:08 AM
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My 68 has a washer tank with the pump mounted in it. 3 screws hold it to the inner finder.
 
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