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    Re: Isuzu Trooper 1990 4-cyl petrol Archived Message

    Posted by David Davies on September 29, 2008, 9:19 pm, in reply to "Isuzu Trooper 1990 4-cyl petrol"

    From Autodata 1992 EFI manual:Relay pos. 1 connected to aux circuits relay via fuse and zener diode,pos, 2 earth,pos. 3 fuel pump,pos. 5 battery via fuse,pos 6. starter circuit.In theory if you connect with jump leads to a known good alternator system then current should flow through the zener diode and fuel pump should operate.

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