I just purchased a 82 Buik Riv. No manual yet. I know it has an airpump under the hood for the air shocks, but no button or switch inside to adjust the shocks. How does this work? Thanks for any help

I just went through this on my daughter's 82' Riv. The fuse was missing,but I needed the manual to know which it was (lowest one on the fuse panel,20 amp).The system works by itself,with a 20 second delay (for bumps) to adjust the ride height.With key on,test for 12 volts at the orange wire on the compressor.That means you have power.12 vots to the green wire terminal should make the pump work. Grounding the white wire should vent it.Test for at least 20 psi in the system at the shrader valve on the pump.Any more than this,you need the manual.I got mine at factoryautomanuals.com,good folks.