E 250 Van V8-351 5.8L VIN H 4-bbl HP (1985)
Barometric Pressure Switch: Testing and Inspection
Component Testing
Fig. 43 Ignition barometric pressure switch resistance chart. 1985---87
1.
Disconnect switch from ignition module.
2.
Connect suitable ohmmeter across switch terminals and compare resistance measured to values in chart.
3.
Replace switch if resistance is not within specifications.