Test B: No Power In ACC/Run

Pinpoint Test B: No Power in ACC/RUN

Normal Operation
The smart junction box (SJB) receives fused battery power from the battery junction box (BJB) fuse 17 (50A) circuit 16 (RD/LG) and fuse 1 (25A) circuit 37 (YE). The SJB then provides the ignition switch with fused battery power through fuse 4 (10A) circuit 1715 (RD). When placed in ACC, the ignition switch provides a voltage signal to the SJB on circuit 297 (BK/LG). When placed in RUN, the ignition switch provides voltage signals to the SJB on both circuit 297 (BK/LG) and circuit 1050 (LG/VT).

B1-B3:

B3-B5:

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Possible Causes
^ Circuit 297 (BK/LG) open or short to ground
^ Circuit 1050 (LG/VT) open or short to ground
^ Ignition switch
^ SJB