What was found
(CAN) ON PREPARATION FOR TAKEOFF WARNING LIGHT ILUMINATED WHEN GUSTLOCK RELEASED. A/C RETURNED TO RAMP. INVEST. REVEALED THAT SWITCH CNTLLING LIGHT BURNED, GIVING UNSAFE WARNING, ALTHOUGH GUSTLOCK SYS WAS IN NORMAL OP CONDITION. DEFECT DEFERRED IAW A/C MEL 27-11,&IN COMPLIANCE WITH NOTE 4(A) ACTUATOR REMVD & ELECT. CONNECTIONS SECURED TO STRUCTURE: A/C DEPARTED BUT AGAIN HAD WARNING LIGHT ON RELEASE OF GUSTLOCK. A/C RETURNED TO RAMP & WITHDRAWN FROM SERVICE, PENDING REPL SWITCH. IT HAD NOT BEEN REALIZED THAT REMOVING ACTUATOR DID NOT DEACTIVATE WARNING LIGHT CCT, HENCE REPEAT WARNING WITH DEACTIVATED SYS.