TM 10-3930-659-20 6-31. SECONDARY STEERING SWITCH REPLACEMENT. b. INSTALLATION 1. Install two new preformed packings (5) on secondary steering switch (2). 2. Install secondary steering switch (2) on inlet manifold (1). 3. Install engine frame wiring harness (3) on secondary steering switch (2). 4. Connect engine frame wiring harness (3) to under cab wiring harness connector (4). FOLLOW-ON TASKS: • Install cab skirts (see paragraph 14-6). TA707814 6-128