TM 10-3930-675-20-1 0016 00-8 INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED 0016 00 Table 12. Error Code 419 - 4WD Steering Selection Switch, Circuit Failure Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 419 - 4WD Steering Selection Switch, Circuit Failure - Continued 5. Check     continuity     between connector  X160  pin  14  and connector X177 pin 14. a.  If   continuity   between   pins, repair  or  replace  connectors (WP 0111 00). b. If continuity (short) to chassis, repair   or   replace   connectors (WP 0111 00). c.  If continuity is present, notify SRA. 6. Check     continuity     between connector  X177  pin  14  and steering ECU (792) connector pin 46. a.  If   continuity   between   pins, repair  or  replace  connectors (WP 0111 00). b. If continuity (short) to chassis, repair   or   replace   connectors (WP 0111 00). c.  If continuity is present, notify SRA. Table 13. Error Code 420 - Crab Steering Selection Switch, Circuit Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 420 - Crab Steering Selection Switch, Circuit Failure 1. Check voltage at crab steering selection switch connector 138 pin  5.  Voltage  should  be  22- 26V. If   voltage   is   not   as   specified, check wires 1529B, 1529C, and 1529D   for   damage.   Repair   or replace connectors (WP 0111 00). 2. Check voltage at crab steering selection switch connector 138 pin  1.  Voltage  should  be  22- 26V with switch activated and 0V with switch not activated. If   voltage   is   not   as   specified, replace   crab   steering   selection switch (WP 0131 00 and WP 0072 00). 3. Check continuity between crab steering selection switch connector    138    pin    1    and connector X153 pin 15. a.  If   continuity   between   pins, repair  or  replace  connectors (WP 0111 00). b. If continuity (short) to chassis, repair   or   replace   connectors (WP 0111 00). c.  If continuity is present, notify SRA. 4. Check     continuity     between connector  X153  pin  15  and connector X160 pin 15. a.  If   continuity   between   pins, repair  or  replace  connectors (WP 0111 00). b. If continuity (short) to chassis, repair   or   replace   connectors (WP 0111 00). c.  If continuity is present, notify SRA.