2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 485Get this manual
Lighting Systems:
Dimmer Switch Inspection
Inspect the dimmer switch in the following procedures: 1) Turn the ignition switch OFF2) Remove the left inner fenderRefer to "Exterior Parts Removal and Installation in Section 9D (Page 9D3)"3) Disconnect the handlebar switch coupler (1) (Yellow)
B827H29206012
4) Inspect the dimmer switch for continuity with the testerIf any abnormality is found, replace the handlebar switch assembly with new oneRefer to "Handlebars Removal and Installation in Section 6B (Page 6B-3)"Special tool0990025008 (Multi-circuit tester set) Tester knob indication Continuity)
Color Position HI LO
I831G1920027-01
5) After finishing the dimmer switch inspection, reinstall the removed partsI827H1180009-01