The trailer brake control switch parameters can be monitored with the scan tool while wiggling the circuits/ harness between the chassis control module and switch looking.

Webmay 2, 2021 · this video shows how to correct the annoying service trailer brake system message that randomly appears on your dash while driving.

The fix is to.

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Websome customers may experience an intermittent check trailer wiring message and/or a service trailer brake message with dtc c1114 on vehicles equipped with itbc.

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