Normal Operation
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition switch is placed in the ACC position fused ignition voltage is sent to Smart Junction Box (SJB) fuse 43 (10A), 45 (5A) and the internal logic of the SJB for ACC circuit monitoring.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ignition switch
- SJB