Right Front Inlet Valve
- Disconnect and inspect Hydraulic Control Unit (HCU) 10-pin connector. Repair connector as necessary. Turn ignition on. With DRB-II in voltmeter mode, probe White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler) at HCU 10-pin harness connector. If no voltage is present, go to next step. If any voltage is present, repair White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler) for a short to battery power. Perform VERIFICATION TEST VER-1A.
- Turn ignition off. Disconnect and inspect CAB 55-pin connector. Repair connector as necessary. With DRB-II in ohmmeter mode, probe White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler) at HCU 10-pin harness connector. If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler) for a short to ground. Perform VERIFICATION TEST VER-1A.
- Using an external ohmmeter, measure resistance of White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler) between CAB connector terminal No. 38 and HCU 10-pin harness connector. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open White/Tan wire (White/Orange wire on Grand Cherokee and Grand Wagoneer or White/Yellow wire on Wrangler). Perform VERIFICATION TEST VER-1A.
- Using an external ohmmeter, measure resistance of right front inlet valve between terminals No. 3 and 5 at HCU pigtail connector. See Fig 1 . If resistance is 5-8 ohms, replace CAB. Perform VERIFICATION TEST VER-1A. If resistance is not 5-8 ohms, replace hydraulic control unit. Perform VERIFICATION TEST VER-1A.