From memory there are at least 3 relays there plus 1 relay holder without relay, this is a purple relay holder for the air con where fitted, even where air con is not fitted the relay holder will be there, there is a(black ?) relay with a 30amp green fuse next to it for the abs.
There are then 2 yellow relays, one is the main power relay, which is triggered by the ignition on terminal 86, this also goes to ECU terminal number 17, as well as TPS, ISCV, CANISTER PURGE(cat models) and INJECTORS, the other yellow relay(fuel pump relay) where it enters on terminal 86, the fuel pump relay(which can be identified by having a thick black/red wire = fuel pump output) also feeds the AMAL and FUEL PUMP, it does this when also triggered by terminal 28 from the ECU(in addition to the feed at terminal 86 from the main feed relay).
Any current put across the injectors, where not opposed WILL show across BOTH terminals at each injector, as it is simply a coil winding, when the system is working as it should the opposing NEGATIVE "trigger" pulses from the ecu create a magnetic field in each injector that opens them when triggered by causing movement inside them.
If you pull the two YELLOW relays out, check that you have a feed of LIVE on terminal 30 on each, this is a battery feed, both the relays output to terminal 87 LIVE(85+86 are the triggers), so you could put a wire jumper from 30 to 87 on each relay holder if you want, this simply by passes the ignition key(YES THEY ARE THAT HARD TO STEAL HA HA!!), have the key on though when doing this just to be safe, if it then works, you know you have a main supply issue, if no live at terminal 30 at each yellow relay, that needs sorting first, though this can be "stolen" from elsewhere for fault finding purposes.
Pm me your email and I'l send you a copy of the wiring diagram.
tabetha