Download 1. Place transmission in Park, turn ignition off and wait at least 6 seconds. Turn ignition on, engine off and observe 3 shift select buttons. If all 3 buttons blink once, go to next step. If all 3 buttons do not blink once, go to step 1 under TEST RESULTS . 2. During step 1) , if one button remains lit to indicate transfer case shift position, go to next step. If one button did not remain lit, go to step 3 under TEST RESULTS . 3. Shift transfer case to 4HI, to 2HI, then back to 4HI. If transfer case mode shifts between 4HI and 2HI, go to next step. If transfer case mode does not shift between 4HI and 2HI, go to step 5 under TEST RESULTS . 4. Apply parking brake. Place transmission in Park (A/T) or 1st gear (M/T). Turn ignition on, engine off. Place transfer case in 4HI position. Press 4LO shift select button. If 4LO shift select button blinks for 30 seconds then stops when 4HI button illuminates, go to next step. If operation is not as specified, go to step 7 under TEST RESULTS .