Greetings Lincoln Lovers –
When diagnosing vacuum operated accessories such as a/c heat controls, vacuum headlamp cover controls and vacuum power door locks etc. on your car a valuable tool for you to use is a Hand Held Vacuum Pump. These pumps which also have their own vacuum gauge display allow you to diagnose many individual vacuum operated components of a system by allowing you to disconnect them and operate them separately with your Pump in order to test their individual integrity. This avoids guessing and replacing parts that are not defective. We at Lincoln Land find these tools along with the vacuum schematic and shop manuals very useful for accurate troubleshooting.