Unexpected Seat Belt Light Flashing

[ern-diz]

Hey gang - Not sure this is the best place to post about this, but I saw 68 people viewing this section which was higher than the in-car entertainment section, so here it goes...

This last weekend I installed a couple sparco R100 tuner seats in my '07 hatchback. We relocated the factory seat belt buckles and respective wiring to the sparco seats and reconnected the wire harnesses, with the exception of the air bag modules (obviously). We expected to see the amber 'airbag off' light to the right of the AC vent, as well as the red airbag light on the dash cluster itself. What we didn't expect to see is a red flashing seat belt light on the same panel to the right of the AC vent where the airbag on/off lights are. Any idea why that light might be flashing?

The passenger seat belt buckle had two wire harnesses for what we believed to be the seat belt and airbag. The driver seat had a third harness (no idea what for). Both seat belts buckle and there is no beeping. Unbuckling the driver seat belt produces a red seat belt light on the dash cluster, as normal. Buckling the driver seat belt makes that light go away, so I'm sure the flashing seat belt light on the right side in the air bag on/off light area is related to the passenger seat belt. Buckling the passenger seat belt doesn't make the light disappear. We tested coming to a hard stop and both seat belts still lock-up under hard braking. Everything appears to be normal, so we couldn't understand why the blinking seat belt light appeared. The only thing we didn't reconnect on the passenger seat was the airbag wire harness.

Any help while I'm searching the forum/internet on my own would be greatly appreciated.