i put a boost gauge in the right hand side vent. every thing works but when i put the car back together the air bag light stays on. my supra is only two days old to me so thanks for any help.

HERE'S THE FIX FROM WWW.MKIV.COM

How to turn off the airbag light

Problem: Disconnecting the connector behind the upper dash piece where the odometer is located while the ignition key is turned on will result in the airbag light staying on.

Here's how to turn it off :

Go under the hood and open the diagnostic cap located on the passenger-side near the firewall (see photo). Look for AB & TC. Make two plugs with wire to fit into these connectors. With the ignition key turned to the ON position alternate the two wires to the negative terminal of the battery. They need to be done in a consistent rhythm, about one second apart. TC,AB,TC,AB,TC,AB... This needs to be done several times. If you can't get it to work, try adjusting the speed. It is helpful to have someone look at the airbag light while performing this to let you know when the light goes out/blink.