Hi. having a problem with a ef xr 6 cut out while driving no spark hasnt started since replaced cas thinking that was problem, still nothing,getting power to coil pack and negative to signal wires,power from relay to ecu cant get fault codes working as per manual bridged ab test light between v and c nothing happens any help would be apreciated

check 30amp engine fuse link under bonnet -
check for power at injectors- fed by ECU relay
verify bridging terminals "a-b" -A=top left corner and immediately below for B
is there power at V ? how heavy a load is test light

thanks mate .yeah fuse is fine geting power other side of fuse box and relay next in circuit getting 12.4 volts from v on plug and bridged a b havent tryed testing at injectors from ecu ,thought if ecu was fryed would get nothing at signal wires but not sure on this tryed using multimeter insted of test light for codes but got nothing still

does interior light work -
is smartlock light turning off -
make sure earths at battery not disconnected/broken-

reason for checking power at injectors is to verify engine/ecu relay and circuit is working

use a analog meter -digital meter with bar graph or test light with small globe or led test light to check for codes

possible coil fault - hi wattage test light (21w) across power and each pulse wire (3 yellow with trace)should flash when cranking -
check harmonic balancer hasn't slipped - and wire to cas not shorted or broken-
won't stop you from scanning however-