Chart C Telltale Lamp Does Not Come "On" Steady During Crank

CIRCUIT DESCRIPTION
When the Ignition Switch is first turned "On," system voltage is applied from the "IGN 1" fuse to "WLAMPHI," Terminal "B9," and to the "Air Bag" telltale lamp which is connected to "WLAMPLO," Terminal "A1." The "Air Bag" fuse applies system voltage to the "IGN 1" inputs, Terminals "A3" and "B3." The DERM responds by flashing the "Air Bag" telltale lamp seven times.

When the engine is being cranked, system voltage is applied from the "IGN 3" fuse to the DERM at the "Crank" input. The DERM responds by grounding the "WLAMPLO" output until system voltage is removed from the "Crank" input. This results in the "Air Bag" telltale lamp being "On" during cranking.

After cranking the DERM will again flash the "Air Bag" telltale lamp seven times.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks whether the fault is due to an open "IGN 3" fuse.
2. This test checks for a proper signal to the "Crank" input during cranking.
3. This test determines whether the lack of a proper crank signal is due to an open "Crank" input circuit or an open power feed to the "IGN 3" fuse.
4. This test checks whether the "IGN 3" fuse is open due to a short to ground in the "Crank" input circuit.
5. This test determines whether the short to ground is in the wiring harness or in the DERM.