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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 839 (Instrument Cluster System (F250-F550)) >> Diagnostic Tests >> Instrument Cluster (IC) >> Pinpoint Tests >> Pinpoint Test N: The Air Bag Warning Indicator Is Never/Always On >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The air bag warning indicator receives voltage through the instrument cluster when the ignition switch is in the START/RUN position. The instrument cluster illuminates the air bag warning indicator when it receives an open (no ground) from the restraints control module (RCM) on control circuit 608 (BK/YE). The instrument cluster turns off the air bag warning indicator if it receives a ground signal from the RCM on control circuit 608 (BK/YE).

DTC B1869 - sets if the RCM detects an open or short to ground on circuit 608 (BK/YE).

DTC B1870 - sets if the RCM detects a short to voltage on circuit 608 (BK/YE).

Possible Causes

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