What was found
FLAPS SELECTED TO 8 DEG ON APPROACH, FLAPS FAIL CAUTION MESSAGE ILLUM. RIGHT FLAPS INDICATED 0 DEG & LEFT 2 DEG. C/W QRH, DECLARED AN EMERGENCY, MADE AN UNEVENTFUL LANDING WITH ZERO FLAPS. MX DEPLOYED FLAPS TO 20 DEG, AIRCRAFT FERRIED TO DAY. MX INSPECTED & FOUND SKEW DETECTION UNIT CONNECTORS CONTAMINATED WITH GLYCOL. CANNON PLUGS CLEANED IAW STANDARD MAINTENANCE PROCEDURES. AS PRECAUTION FLAP ELECTRONIC CONTROL UNIT WAS REPLACED IAW CRJ 200 AMM 27-51-05-000-801/400-801. THE REMOVED UNIT WAS PUT INTO QUARANTINE. THE FLAP RIGGING WAS CHECKED IAW CRJ 200 AMM 27-54-00-710-801 AND THE FLAP SYSTEM WAS OPERATIONALLY CHECK GOOD IAW CRJ 200 AMM 27-54-00-710-801. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.