1. Ignition: OFF 2. Remove ADS control module (N51) (Figure 1). 3. Remove bolts (a) and frame ( b). 4. Unclip electrical connecter (c, arrows) at frame (b) and remove. 5. Connect socket box and test cables (Figure 2). Electrical wiring diagrams: Electrical Troubleshooting Manual, Model 129, Volume 1, Group 00 and 32. Note: An ADS control module (N51) marked with a red paint dot has been reprogrammed. Upon replacement, the level must be checked, adjusted, and new control module must be reprogrammed using the HHT (refer to 11 and HHT menu selection "Programming"). After reprogramming control module, mark control module with red paint dot for identification purposes.

Test equipment; See MBUSA Standard Service Equipment Program

Description	Brand, model, etc.
Digital multimeter	Fluke models 23, 77 III, 83, 85, 87