LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2010 >> MKZ FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1103 (Exterior Lighting System) >> Diagnostic Tests >> Headlamps >> Pinpoint Tests >> Pinpoint Test C: Both High Beams Are Inoperative >> Pinpoint Test C: Both High Beams Are Inoperative

Pinpoint Test C: Both High Beams Are Inoperative

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. C1 CHECK THE LOW BEAMS 
    • Key in OFF position.
      • NOTE: Make sure the multifunction switch is in the LOW BEAM position.
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Are the low beams illuminated? 
    1. YES  : Go to  C2.
    2. NO  : Go to Pinpoint Test A .
  2. C2 BYPASS THE MULTIFUNCTION SWITCH 
    • Place the headlamp switch in the OFF position.
    • Disconnect: Multifunction Switch C202b
      • Fig 1: Connecting Fused (20A) Jumper Wire Between Multifunction Switch C202B-11 & C202B-10, Circuit 195 (TN/WH) & 632 (GY/OG)
      GF0044885Courtesy of FORD MOTOR CO.
    • Connect a fused (20A) jumper wire between the multifunction switch C202b-11, circuit 195 (TN/WH), harness side and the multifunction switch C202b-10, circuit 632 (GY/OG), harness side.
    • Do the high beams illuminate? 
    1. YES  : VERIFY the CJB fuse 30 (15A) is OK. If OK, REMOVE the jumper wire. INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
    2. NO  : LEAVE the jumper wire connected. Go to  C3.
  3. C3 CHECK FOR VOLTAGE TO THE CJB FUSE 30 (15A) 
      Fig 2: Checking For Voltage To CJB Fuse 30 (15A)
      GF0044886Courtesy of FORD MOTOR CO.
      NOTE: Make sure the CJB fuse 30 (15A) is good before continuing diagnostics.
    • Measure the voltage between the CJB fuse 30 (15A), input side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REMOVE the jumper wire. REPAIR circuit 12 (LG/BK) for an open. TEST the system for normal operation.
    2. NO  : REMOVE the jumper wire. REPAIR circuit 632 (GY/OG) for an open. TEST the system for normal operation.
scientia non olet · About LEMON Manuals