Need a fuel pump and sending unit diagram (in-tank area)?

Tiny
RDIUS
  • MEMBER
  • 1994 MERCURY CAPRI
  • 1.6L
  • 4 CYL
  • AUTOMATIC
  • 90,000 MILES
I need a wiring diagram for the fuel pump and sending unit (in-tank area). Replacing pump and several wires broke off. Adding images of wires straight through, (minus connectors in between). Will be soldering wires back on. In-tank and external side pump and sending unit diagram.
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Thursday, April 17th, 2025 AT 1:22 PM

5 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 34,136 POSTS
See if this gets you to where you want to be. Let me know if there's other parts of a diagram you need.
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Thursday, April 17th, 2025 AT 2:52 PM
Tiny
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Are these the actual sending unit and fuel pump wires inside the gas tank? I believe this is the exterior unit connections.
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Thursday, April 17th, 2025 AT 4:41 PM
Tiny
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The wires and hoses on the pump assembly are considered part of that assembly. As such, no one publishes a wiring diagram that includes wire colors. You have to go by the locations in the connector, and the symbols used for the pump and sending unit.

Can you see where the yellow wire, for example, continues on inside the tank? If not, because that connector is hidden, you can perform continuity tests to find which wire inside corresponds to one on the outside. If that doesn't help, try to post a photo showing the broken wires.
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Friday, April 18th, 2025 AT 1:46 PM
Tiny
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Yes, thanks. Understand what you mean. I was just hoping it was printed somewhere outright.
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Saturday, April 19th, 2025 AT 11:23 AM
Tiny
CARADIODOC
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Please keep me updated on your progress, and let me know if I can offer more of my wondrous advice.
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Saturday, April 19th, 2025 AT 2:49 PM

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