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Sending unit upgrade installation 700 1987

uid 18083's pic
posted by  lucid on  Sun Aug 29 02:18 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Implementing Colin's excellent suggestion would be a breeze (by jumpering 2 fuses) on a 240. Not so easy on the 700, but here's what I would do...

1) Disconnect the fuel line at the injector rail and route it into a safe container.

2) Remove Intank pump Fuse 11 and improvise a jumper wire to apply voltage to the Fuse 11 terminal that is farthest away from you, i.e., toward the engine.

You can get battery voltage from the Fuse 1 terminal closest to you, after the fuse is removed. Use a jumper wire with a flat male terminal on each end, to take voltage from F1 to F11.

The Intank pump should push a good flow of fuel (thru the unpowered Main pump) all the way to the injector rail.

To run/test the Main pump, jumper voltage to the other F11 terminal, the closest one.

NOTE: This is from a '93 Green Book wiring diagram, which is all I have. It should work for you if Fuse 11 is for your Intank pump.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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