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VTSS Test 7A - Horn Inoperative In Theft Mode

NOTE: Perform VTSS TEST 1A  before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For wiring diagrams, refer to WIRING DIAGRAMS  . Perform, after each repair, VERIFICATION TEST VER-1A - VERIFICATION PROCEDURE  .
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Press horn button on steering wheel. If horn does not sound, go to STEERING COLUMN SWITCHES article in this Section. If horn sounds, go to next step. 2 Locate Central Timer Module (CTM). CTM is located behind right kick panel. Disconnect CTM 18-pin connector "B". Using an external voltmeter, measure voltage between ground and CTM 18-pin connector "B" terminal No. 18 (Black/Red wire). If voltage is more than 9.5 volts, replace CTM. If voltage is 9.5 volts or less, repair open in Black/Red wire between CTM and horn relay.