B4000 SE Regular Cab 4WD V6-4.0L OHV (1999)
1. Measure the resistance between the multi-function switch terminals.
If the resistances are as specified, the multi-function switch is OK. Return the multi-function switch to the vehicle. Test the system for normal
operation.
If the resistances are not as specified, replace the multi- function switch. Test the system for normal operation.