Pinpoint Tests

PINPOINT TEST A: THE UPFITTER RELAY BOX DOES NOT OPERATE CORRECTLY

A1-A3:

A3-A4:

A4-A5:

A6-A10:

A10-A14:

A14-A15:

Normal Operations
With the key in the ON position, voltage is supplied to the upfitter relay control circuit, closing the upfitter relay. When the upfitter relay closes, voltage is supplied to the upfitter switch through the upfitter relay box fuse 701 through circuit 1717 (VT/OG) and circuit 296 (WH/VT). The upfitter relay box fuse 701 (5 A) supplies voltage to the upfitter control switches through circuit 296 (WH/VT). Voltage is supplied to the switched side of the upfitter relays on circuits 1448 (OG/RD) (upfitter relay No. 1), 1445 (RD/LG) (upfitter relay No. 2), 1446 (RD/LB) (upfitter relay No. 3), or 1447 (RD) (upfitter relay No. 4). When a control switch is closed it supplies voltage to 1 of the 4 upfitter relays through circuit 153 (VT/YE) (upfitter relay No. 1), 154 (VT/LG) (upfitter relay No. 2), 155 (GY/RD) (upfitter relay No. 3), or 156 (GY/OG) (upfitter relay No. 4) closing the upfitter relay. When the relay closes, voltage is supplied through the relay to the output circuits (blunt cut ends) 1936 (OG/LG) (upfitter relay No. 1), 1933 (OG) (upfitter relay No. 2), 1934 (OG/YE) (upfitter relay No. 3), or 1935 (OG/LB) (upfitter relay No. 4).

Possible Causes
- Fuse(s)
- Circuit 57 (BK) open
- Circuit 153 (VT/YE) open
- Circuit 154 (VT/LG) open
- Circuit 155 (GY/RD) open
- Circuit 156 (GY/OG) open
- Circuit 296 (WH/VT) open or short to ground
- Circuit 570 (BK/WH) open
- Circuit 1445 (RD/LG) open or short to ground
- Circuit 1446 (RD/LB) open or short to ground
- Circuit 1447 (RD) open or short to ground
- Circuit 1448 (OG/RD) open or short to ground
- Circuit 1717 (VT/OG) open or short to ground
- Circuit 1933 (OG) open
- Circuit 1934 (OG/YL) open
- Circuit 1935 (OG/LB) open
- Circuit 1936 (OG/LG) open
- Upfitter relay(s)
- Upfitter relay switch(es)
- Upfitter relay box
- Central junction box (CJB)