Dok

check this
 
  All Falcons up to January 1971 had a dual numbering system, consisting of both the Body Prefix Number and VIN (Vehicle Identification Number). The VIN was stamped on the passenger side support panel, and this should match the number stamped on the I.D. plate (which was attached to the drivers side pre January 1970, and on the bulkhead for the remainder of 1970). As of January 1971 Ford switched to using a 3 way identification system, the body prefix and serial number as located on the ID plate should be the same as on the engine and shock tower.   The body prefix number should be 6 characters in length, consisting of 2 letters, then 2 numbers, followed by another 2 letters.    Letter 1:   The first letter in the body prefix identifies the country, with "J" identifying Australia   Letter 2:   The next letter in the body prefix identifies the assembly plant, with "G" identifying Broadmeadows   Numbers 3 and 4:   The following 2 numbers identify the model   COUNTRY ASSEMBLY PLANT MODEL ID MODEL   J G 11 Futura Sedan J G 12 Futura Taxi J G 21 Falcon Sedan J G 22 Falcon Taxi J G 23 Falcon 500 Sedan J G 24 Falcon 500 Taxi J G 30 Falcon Wagon J G 31 Falcon 500 Wagon J G 32 Fairmont GXL J G 33 Falcon GT Sedan J G 34 Fairmont Sedan J G 35 Fairmont Wagon J G 36 Fairlane Custom J G 37 Fairlane 500 J G 38 Fairlane Custom Taxi J G 39 Fairlane 500 Taxi J G 40 Falcon Utility J G 41 Falcon 500 Utility J G 42 Falcon Van J G 43 Falcon 4WD Utility J G 45 Falcon 500 Van J G 47 Falcon Sundowner Van J G 62 Galaxie Sedan J G 63 Fairlane Marquis J G 64 Fairlane Ghia J G 65 Falcon 500 Coupe J G 66 Falcon GT Coupe J G 67 Fairmont Coupe J G 70 Landau Hardtop J G 71 LTD   Letters 5 and 6:   The next letters in the body prefix identify the year and month of manufacture, as per the table below:   YEAR CODE JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC   1965 E J U M P B R A G C K D E 1966 F L Y S T J U M P B R A G 1967 G C K D E L Y S T J U M P 1968 H B R A G C K D E L Y S T 1969 J J U M P B R A G C K D E   1970 K L Y S T J U M P B R A G 1971 L C K D E L Y S T J U M P 1972 M B R A G C K D E L Y S T 1973 N J U M P B R A G C K D E 1974 P L Y S T J U M P B R A G 1975 R C K D E L Y S T J U M P 1976 S B R A G C K D E L Y S T 1977 T J U M P B R A G C K D E 1978 U L Y S T J U M P B R A G 1979 W C K D E L Y S T J U M P   1980 X B R A G C K D E L Y S T 1981 Y J U M P B R A G C K D E 1982 A L Y S T J U M P B R A G 1983 B C K D E L Y S T J U M P 1984 C B R A G C K D E L Y S T 1985 F J U M P B R A G C K D E 1986 G L Y S T J U M P B R A G 1987 H C K D E L Y S T J U M P 1988 J B R A G C K D E L Y S T 1989 K J U M P B R A G C K D E   1990 L L Y S T J U M P B R A G 1991 M C K D E L Y S T J U M P 1992 N B R A G C K D E L Y S T 1993 P J U M P B R A G C K D E 1994 R L Y S T J U M P B R A G 1995 S C K D E L Y S T J U M P 1996 T B R A G C K D E L Y S T 1997 V J U M P B R A G C K D E 1998 W L Y S T J U M P B R A G 1999 X C K D E L Y S T J U M P   2000 Y B R A G C K D E L Y S T 2001 1 J U M P B R A G C K D E 2002 2 L Y S T J U M P B R A G 2003 3 C K D E L Y S T J U M P 2004 4 B R A G C K D E L Y S T     TRANSMISSION CODES B 3 Speed Cruisomatic J 3 Speed Manual, Column Shift, Partial Synchro L 4 Speed Manual, Floor Shirt, All Synchro N 3 Speed Manual, Column Shift, All Synchro O 3 Speed Cruisomatic, T-Bar Floor Shift (XT GT Only) P 3 Speed Fordomatic, Column Shift R 3 Speed Cruisomatic, Column Shift     MODEL ENGINE CODE ENGINE XR Falcon C 170ci Six (Low Compression)   E 170ci Pursuit Six   G 200ci Super Pursuit Six   I 289ci Windsor V8 2V   K 289ci Windsor V8 4V   XT Falcon B 188ci Six   Q 188ci Six (Low Compression)   S 221ci Six   U 221ci Six (Low Compression)   W 302ci Mustang 5 Litre V8 4V   Y 302ci Mustang 5 Litre V8 2V   XW Falcon B 188ci Six   H 351ci V8 4V HO   Q 188ci Six (Low Compression)   S 221ci Six   T 351ci V8 4V   U 221ci Six (Low Compression)   Y 302ci V8 2V   XY Falcon E 200ci Six (Low Compression)   G 200ci Six   H 351ci V8 4V HO   J 250ci Six (Low Compression)   K 351ci V8 2V   L 250ci Six 1V   M 250ci Six 2V   T 351ci V8 4V   Y 302ci V8 2V   XA - Falcon & XB Falcon E 200ci Six 1V (Low Compression) G 200ci Six 1V (High Compression)   H 351ci V8 4V HO   J 250ci Six 1V (Low Compression)   K 351ci V8 2V   L 250ci Six 1V (High Compression)   M 250ci Six 2V   T 351ci V8 4V   Y 302ci V8 2V   XC Falcon E 200ci Six (Low Compression)   J 250ci Six (Low Compression)   N 250ci Six (High Compression)   P 302ci V8 4V   T 351ci V8 4V     GT FALCON MODEL CODES 18638 XR GT Falcon XR GT Falcon Specifications XR GT Falcon Identification 18838 XT GT Falcon XT GT Falcon Specifications XT GT Falcon Identification 18938 XW GT Falcon XW GT Falcon Specifications XW GT Falcon Identification 18939 XW GTHO Falcon XW GTHO Falcon Specifications   XW GTHO Falcon Identification 18939 XW GTHO II Falcon XW GTHO II Falcon Specifications XW GTHO Phase II Falcon Identification 18038 XY GT Falcon (1970) XY GT Falcon Specifications XY GT Falcon Identification 18138 XY GT Falcon (1971) XY GTHO III Falcon Specifications XY GTHO Phase III Falcon Identification 18238 XA GT Falcon Sedan XA GT Falcon Specifications XA GT Falcon Identification 18218 XA GT Falcon Hardtop XA GT Falcon Hardtop Specifications XA GT Falcon Hardtop Identification 18338 XB GT Falcon Sedan XB GT Falcon Specifications XB GT Falcon Identification 18318 XB GT Falcon Hardtop XB GT Falcon Hardtop Specifications XB GT Falcon Hardtop Identification

I was running my Ute around, did about 200km, was wondering why fuel guage wasn't going down, flicked tank switch, almost half a tank gone in tank 1, had me buggered, other tank was almost still full besides slop over.
 
So I am reading the wrong tank, this straight away told me there was a wiring problem, but I'd checked EVERYTHING in the back near the tanks.... time to head forward.
 
The tank on the passenger side IS the main tank , just the same as a standard Longreach(Tank-switch position 1) , the auxiluary tank (Tank-switch position 2) is on the drivers side.
I thought I was going crazy..... lol
 
It all came down to relay wiring for the tank selector...... on mine, from the factory......it's backwards...... lol
I know its a factory error because the wiring has been loomed with the wires made those lengths.
Takes a little fiddling after ya finish fixing it to loom it up nicely because of the differing lengths... i forgot pics...soz
 
If you check the 2 relays for the tank selector in the drivers side kick panel with the wiring diagrams below , it makes sense.
I actually had to change over 2 wires from each relay to the opposite relay.
 
The two offender are the black/white stripe wire, and the pink wire on the other relay, swap em over, tank reads and feeds from the correct tank.
 
........Oh and make sure the plug for the back of the tank switch are Red/Yellow on outside and Red on inside.

Here's some pics and wiring diagrams to make it a bit easier mate.........

 
The Outback dual tank wiring schematic.....

 
 
The Outback Fuel selector relay section and wiring codes.
 
 
PLEASE NOTE...... The wiring for socket is looking at it from the top of the relay, with relay out of the socket!
And these diagrams are the CORRECT way it should be wired.

 

The Relay pin on both relays is the left one. Relay one should be pink (mine was black/white), and Relay 2 should be Black/White(mine was pink).
 
It's easy to tell relay 1 from 2..... relay one has pink and black wires running to the centre pin, on relay 2 it is black.
 
Wiring corrected on Relay 1.......

Wiring corrected on Relay 2........

 
 
Here is the wiring for the front of the Outback......

 
 
Here is a simplified version of the wiring for the fuel tank set up........

 
 
The Brass T piece that is inserted as a common fuel delivery line wasn't doing it for me, that nice valve sitting there.. just doing nothing.... shits me....
Also I want the selector valve to hold the pressure while ute sits around to rest on one pump, not two pumps, and I like you Demmo, think there is some funky siphoning effect happening when the brass T-piece is used.
 
The connections for the fuel tanks to selector valve and onto the motor are as so........


 
 
Here is a couple of pictures to compare, please note return lines go on Top smaller lugs, and fuel supply lines go to the Bottom lugs.......  Aux on Drivers Side (as pictured) Main Tank on Passenger side (as pictured)........

 
 
I have also used the "L" shaped adapter filters on the pumps as it lets them get deeper in the slop can, so you get all your fuel.
Check the sender assemblies, the more horizontal of the two pump holders goes in the Aux Tank (Drivers side), the more vertical one goes in the Main Tank (Passenger side).
 
Ok mate, that should make it piss easy. The valve shuts off the tank not selected on the dash switch, I am reading the correct level for each tank, when switched.
Position 1- Main tank. Position 2 (out) Aux Tank. While you have the tank cover off , put ya ear to the tank while car is running on selected tank and make sure they are switching properly........ then bolt it all back up and it's Beer 'O'Clock...... hehe..... rest tomorrow.....
 
Please note, the slop over from tank to tank on these models is quite bad when cornering hard, so if ya lose fuel from the Aux to the Main tank, it's normal. I will try and find a way to prevent this later.
 
Ford On!
 
Jack.