FUEL TANK SELECTOR VALVE wiring diagrams - Diesel Forum - TheDieselStop.com
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6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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Old 07-31-2008, 06:36 PM   #1 (permalink)
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Question FUEL TANK SELECTOR VALVE wiring diagrams

I have a 1987 F250 Ford Diesel 6.9. My FUEL TANK SELECTOR VALVE is DOA as best as I can figure. I bought an FTSV from a 1984 F250 before I found out the part numbers were different. I also tried the plug before before I swapped the valve and found out they were different. The number for the 1984 FTSV is E3TZ1989C. The number for the 1987 FTSV is GC3Z9189A. Does anybody have any idea where to look for the wiring diagrams for both FTSV?
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Old 08-01-2008, 06:49 AM   #2 (permalink)
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Hi, I think I saw some posted on the other Ford truck forum site.


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Old 08-02-2008, 02:37 AM   #3 (permalink)
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I have FSV test info for newer valve 88+ with plug schematic, also some info re 87 valve. I have a lycos email addy for you I will send it......
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Old 08-04-2008, 01:47 PM   #4 (permalink)
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The selector valve is easy to understand. There are 5 pins, labled 1 to 5, from bottom to top as you hold the valve in the upright position. Pins 1 and 2 are the motor. Applying +12 to pin 1, and ground to pin 2 makes the valve switch one way. Applying ground to pin 1 and +12V to pin 2 makes the valve switch the other way. Pins 3, 4 and 5 are what is essentially a single pole double throw switch. Pin 4 is the "hinge" to use old relay parlance. It goes to the fuel gauge. Pins 3 and 5 are the inputs from the fuel tank senders, although I don't remember which is which. I have a schematic here.
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