A) Check for continuity between terminals "5" And "6" socket A.
b) Check for continuity between terminals "4" (positive ohmmeter probe) And "6" (negative ohmmeter probe) connector A and the absence of conductivity - when the ohmmeter probes are connected back.
Note: observe the polarity when connecting the ohmmeter probes (see picture).
V) Check for continuity between terminals "4" (positive ohmmeter probe) And "5" (negative ohmmeter probe) connector A and the absence of conductivity - when the ohmmeter probes are connected back.
If the conditions are not met, replace the relay.
2. Check the operation of the solenoid valve relay.
A) Apply battery voltage to terminal "1" connector A and output "3" socket B.
b) Check for continuity between leads "2" And "5" connector A, and in the absence of conductivity between the terminals "5" And "6" socket A.
3. Check the operation of the electric pump relay.
A) Apply battery voltage to terminals "3" And "4" socket B.
b) Check for continuity between leads "1" And "2" socket B.