B350 1 Ton Van V6-239 3.9L (1990)
Fig. 9 Speed Control Continuity Chart. 1991 Models
1. Disconnect the blade type four wire electrical connector from base of steering column.
2. Using a continuity tester, or an ohmmeter, check for continuity at connector wires. Do not use a test light.
3. Results should be obtained according to the charts. If these results are not obtained, replace switch.
