Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
CONTROL BOX ASSEMBLY
1. INDICATOR LAMP INOPERABLE.
Step 1. Perform lamp test
If four or more lamps fail, go to Malfunction 2, Control Box Assembly.
Step 2. Perform a point-to-point continuity test of appropriate circuit between relay contacts
of K through K9 injunction box and light assemblies DS1 thru DS9.
a. If open is measured between relay contacts, replace relay K10 or K11 as required
b. If open is measured in wiring, tighten connections and/or replace defective wire
d. If continuity exists through entire circuit, replace defective light assembly Refer to