1. Battery voltage 11 - 14 V. 2. Check fuses. 3. All systems functional. Caution: To prevent damage to the control modules, the connectors on the control modules must only be removed or connected with the ignition OFF . Electrical wiring diagrams: Refer to Workshop Information System (WIS)

Conventional tools, test equipment

Description	Brand, model, etc.
Multimeter	Fluke models 1) 23, 78, 87, 88, 98 II

1) Available through the MBUSA Standard Service Equipment Program.