Test C: DTC B1845 Ignition Lock Anti-Theft Switch Circuit Failure
WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Vehicles produced between 4/1/96 and 7/29/96 are considered early production. Vehicles produced 7/29/96 and later are considered late production.
- Turn ignition off. Connect and operate NGS tester according to manufacturer's instructions. Select IGN_RES PID from RAP PID list. If PID reads 162 ohms, rerun SELF-TEST. If resistance is not as specified, go to next step.
- Disconnect RAP connector C336. On early production Mountaineer, check continuity between connector C336 terminal No. 17 (Dark Green/White wire) and C336 terminal No. 14 (Black/White wire). On all others, check continuity between connector C336 terminal No. 17 (Dark Green/White wire) and C338 terminal No. 14 (Black/White wire).
- If resistance is 140-200 ohms, replace RAP module and retest. If resistance is not as specified, check continuity between Connector C336 terminal No. 17 (Dark Green/White wire) and ground. If resistance is 140-200 ohms, repair open Black/White wire and retest. If resistance is not as specified, repair Dark Green/White wire and/or replace ignition lock anti-theft switch and retest.