The wiring harness to choose for this switch is Santech MT0135. I have listed this "pigtail" elsewhere on Ebay. See the photos for list of compatible vehicles. In particular, see Buick, Cadillac and Oldsmobile.
| MT0643 Product Attributes | |
| Pressure Limit Closed | 7.0 PSI |
| Pressure Limit Open | 15.0 PSI |
| Terminal Type | Blade |
| Housing Material | Metal, Plastic |
| Terminal Quantity | 2 |
| Connector Gender | Female |
| Terminal Gender | Female |
| Color | Black/White |
| Comp Open/Closed | Open |
| Description | Switch-Pressure/System Mount |
| Fitting Thread Size | 7/16”-20 |
| Style | Pressure |
| Type | Low Cut-Out |