Test 17: Entrance/Exit Light Circuit

Using Harness Adapter (210 589 01 63 00), connect Breakout Box (129 589 00 21 00) to combination control module. Measure voltage between terminals No. 27 and 75 at breakout box. When any door is opened, battery voltage should exist. When all doors are closed, less than one volt should exist. If voltage is as specified, entrance/exit light circuit is okay at this time. If voltage is not as specified, check the following and repair as necessary:

• Check wiring.
• Check door switches.
• Check combination control module.
• Check Pneumatic System Equipment (PSE) control module.
• CAN data line. See WIRING DIAGRAMS in the DOOR LOCKS - PNEUMATIC & POWER article.