Royal Enfield Himalayan, Service Manual, Page: 180 / 214

ROYAL ENFIELD HIMALAYAN BS III VEHICLE SERVICE MANUAL
179
STEP 3 :
The positive probe of the multimeter shall be kept on all the 3 phase terminals one by one and the
condition of the 3 diodes to be checked as mentioned in Step 2.
STEP 4 :
To check the condition of other 3 negative diodes, positive probe (Red colour) of the multimeter shall be kept on the
negative terminal of DC output (black wire with eyelet/single pole connector) and negative probe (Black colour) of
the multimeter shall be kept on anyone of the 3 phase terminals (yellow wire).
If the diode is good, then the multimeter will show a voltage drop of 0.4~0.7V.
If diode has failed, multimeter will show either open or short with beep sound, then Replace the RR unit.
STEP 5 :
All the three diodes to be checked by keeping the multimeter negative probe on all the 3 phase terminals one by one.
If the RR Unit is not working, replace with good working RR Unit.