You have a sensor with a preset weight. If you put something or someone in that seat and the sensor picks up that whatever is in the seat does not weigh enough for proper airbag deployment it turns the light on. Mine comes on if put ANYTHING in the seat and then the light stays on til I smack the seat with my hand----total pain in the ***.
Roush Stage 1 blower, Roush axle backs,MRT resonator delete,Roush coilovers,MM camber plates,Blowfish shifter bracket,Whiteline trans bushing,Steeda g-force brace,SR rear sway bar,Roush rear spoiler and heat extractors,25mm wheel spacers,and Ford Performance hood shocks,JLT oil separator,Flossy heavy weight shift knob and a newly acquired super speeder ticket!!!