hotwiring AC compressor

[krjt]

My AC compressor is not kicking on, so I may have let too much gas leak out before recharging. Last time it was recharged was at least three plus years ago. In order to recharge the system I recall the compressor had to kick in to accept the gas.

Can anyone refresh my memory on how to hot wire the compressor so it will bypass the low pressure switch.

Thanks.