Daf lf 45 Cranks but wont start

Hi, i am hoping you guys can help me. I have a Daf lf 45 truck that cranks but wont start. It is throwing up the following codes,

Code 651.5
Measured current strength from cylinder 1
injector (B131) is too low. This is the current
between pins C09 and C13 of the ECU,
caused by:
-interruption in injector wiring
-bad connection point at injector

Code 653.5
Measured current strength from cylinder 3
injector (B133) is too low. This is the current
between:
BE: pins C11 and C16 of the ECU,
CE: pins C04 and C12 of the ECU,
caused by:
-interruption in injector wiring
-bad connection point at injector

I was told to buy injectors, but before doing so i wanted to get some of your views before i go onto buy the injectors. On its last trip, the truck seemed to be on limp mode as it was doing a maximum of 40kms.

Please any help or advice will be much appreciated. The truck is in Africa.

check the continuity of the wiring from the injector to the socket including shorts then check from the plug to the ecu…if the wiring is ok check the resistance of the 2 suspect injectors,Or swap injectors 1 and 3 with 2 and 4 see if the faults transfers with the injectors

Think you very much. I will follow those instructions and update you with the results soon.