REPLACED BULBS,RELAYS AND FUSES...STILL NOT COMING ON. HIGH BEAMS WORK FINE! ANY SUGGESTIONS?
Hi. i recommend a thorough inspection of the wiring harness and harness connectors that led to the actual headlights. use a volt meter to test the current flow to the connectors. pull the connectors from the back side of the headlights and test all cooper contacts inside the connectors. If the wire contacts all show voltage, this will confirm a switch malfunction. it should be replaced in this case.
Now, if one or more contacts on the wires harness fail to produce any voltage, this will confirm a faulty wiring harness. replace the wiring harness in this case.
Make sure the headlight switch is in the on position when testing the wires.
I have a 2002 ford focus no low beams changed Multifunctional switch in column and didnt solve issue, checked relay and voltage to box all fuses and voltage is present from relay box to wiring harness connector on low beam side no voltage
Changing parts is not the correct way to fix this problem . Viewing wiring diagrams to see what all is involved in turning on the low beams . Then testing with a DVOM - digital volt ohmemeter to see where the voltage is lost is how to find the problem . Does the vehicle have DRL - daytime running lamps ?
PINPOINT TEST B: THE LOW BEAMS ARE INOPERATIVE
CONDITIONS DETAILS/RESULTS/ACTIONS
B1 DETERMINE THE VEHICLE EQUIPMENT
Determine the vehicle equipment.
Has the vehicle daytime running lamps?
Yes
GO to B2 .
No
GO to B4 .
B2 CHECK FUSE F22 (BJB)
Fuse F22 (BJB)
Check the fuse F22 (20 A).
Is the fuse OK?
Yes
GO to B3 .
No
INSTALL a new fuse F22 (20 A). If the fuse blows again, LOCATE and REPAIR the short circuit by using the wiring diagrams. TEST the system for normal operation.
B3 CHECK THE VOLTAGE AT FUSE F22 (BJB)
Fuse F22 (BJB)
Measure the voltage between fuse F22 and ground.
Is battery voltage indicated?
Yes
GO to B4 .
No
CHECK the BJB, if necessary INSTALL a new one. TEST the system for normal operation
B4 CHECK THE VOLTAGE AT THE LOW BEAM RELAY
Low beam relay C1006
Measure voltage between low beam relay, socket C1006, pin 3, circuit 30-LE20 (RD), BJB-side and ground.
Is battery voltage indicated?
Yes
GO to B5 .
No
REPAIR the open circuit 30-LE20 (RD), between low beam relay and splice S102 (resp. fuse F22, with DRL), by using the wiring diagrams. TEST the system for normal operation.
CONDITIONS DETAILS/RESULTS/ACTIONS
B1 DETERMINE THE VEHICLE EQUIPMENT
Determine the vehicle equipment.
Has the vehicle daytime running lamps?
Yes
GO to B2 .
No
GO to B4 .
B2 CHECK FUSE F22 (BJB)
Fuse F22 (BJB)
Check the fuse F22 (20 A).
Is the fuse OK?
Yes
GO to B3 .
No
INSTALL a new fuse F22 (20 A). If the fuse blows again, LOCATE and REPAIR the short circuit by using the wiring diagrams. TEST the system for normal operation.
B3 CHECK THE VOLTAGE AT FUSE F22 (BJB)
Fuse F22 (BJB)
Measure the voltage between fuse F22 and ground.
Is battery voltage indicated?
Yes
GO to B4 .
No
CHECK the BJB, if necessary INSTALL a new one. TEST the system for normal operation.
B4 CHECK THE VOLTAGE AT THE LOW BEAM RELAY
Low beam relay C1006
Measure voltage between low beam relay, socket C1006, pin 3, circuit 30-LE20 (RD), BJB-side and ground.
Is battery voltage indicated?
Yes
GO to B5 .
No
REPAIR the open circuit 30-LE20 (RD), between low beam relay and splice S102 (resp. fuse F22, with DRL), by using the wiring diagrams. TEST the system for normal operation.
B5 CHECK THE CONTROL CIRCUIT OF THE LOW BEAM RELAY
Switch on the LOW BEAM.
Measure the voltage between low beam relay, socket C1006, pin 1, circuit 15S-LE19 (GN/BU), BJB-side and ground.
Is battery voltage indicated?
Yes
Vehicles with DRL: GO to B6 .
Vehicles without DRL: GO to B7 .
No
GO to B8 .
B6 CHECK THE POWER CIRCUIT OF THE LOW BEAM RELAY
Connect a fused jumper wire (20 A) at the low beam relay, socket C1006, between pin 3 and pin 5, BJB-side.
Check the low beams.
Do the low beams illuminate?
Yes
GO to B7 .
No
REPAIR the open circuit 15S-LE20 (GN/RD), between low beam relay and splice S120, by using the wiring diagrams. TEST the system for normal operation.
B7 CHECK THE GROUND CONNECTION OF THE LOW BEAM RELAY
Measure the resistance between low beam relay, socket C1006, pin 2, circuit 91-LE19 (BK/BU), BJB-side and ground.
Is the resistance less than 2 ohms?
Yes
INSTALL a new low beam relay. TEST the system for normal operation.
No
REPAIR the open circuit 91-LE19 (BK/BU), between low beam relay and splice S118, by using the wiring diagrams. TEST the system for normal operation.
B8 CHECK THE MULTIFUNCTION SWITCH
Multifunction switch C459
Connect a fused jumper wire (7,5 A) at the multifunction switch, connector C459, between pin 8 and pin 9, harness side.
Measure the voltage between low beam relay, socket C1006, pin 1, circuit 15S-LE19 (GN/BU), BJB-side and ground.
Is battery voltage indicated?
Yes
INSTALL a new multifunction switch. TEST the system for normal operation.
No
GO to B9 .
B9 CHECK THE CONTROL CIRCUIT OF THE LOW BEAM RELAY
Measure the resistance between multifunction switch, connector C459, pin 9, circuit 15S-LE19 (GN/BU), harness side and low beam relay, socket C1006, pin 1, circuit 15S-LE19 (GN/BU), BJB-side.
Is the resistance less than 2 ohms?
Yes
GO to B10 .
No
REPAIR the open circuit 15S-LE19 (GN/BU), between multifunction switch and low beam relay, by using the wiring diagrams. TEST the system for normal operation.
B10 CHECK THE VOLTAGE AT THE LIGHT SWITCH
Multifunction switch C459
Light switch C320
Measure the voltage between light switch, connector C320, pin 8, circuit 15-LE29 (GN/BK), harness side and ground.
Is battery voltage indicated?
Yes
GO to B11 .
No
REPAIR the open circuit 15-LE29 (GN/BK), between fuse F61 (CJB) and light switch, by using the wiring diagrams. TEST the system for normal operation.
B11 CHECK THE LIGHT SWITCH
Connect a fused jumper wire (7,5 A) at the light switch, connector C320, between pin 6, circuit 15S-LE14 (GN/RD) and pin 8, circuit 15-LE29 (GN/BK), harness side.
Measure the voltage between low beam relay, socket C1006, pin 1, circuit 15S-LE19 (GN/BU), BJB-side and ground.
Is battery voltage indicated?
Yes
INSTALL a new light switch. TEST the system for normal operation.
No
REPAIR the open circuit 15S-LE14 (GN/RD), between light switch and multifunction switch, by using the wiring diagrams. TEST the system for normal operation.
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Most likey the light switch or multi function switch.
CAUTION: Disconnect the battery ground cable. For additional information, refer to Section 414-01 . 3,480 views
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it's actually a 2002 ford focus, but problem fixed. replaced the turn signal switch on steering column. now both high beam and low beam come on properly.
i thank everyone for the advise.
thanks for the advice. the problem was in the turn signal switch on the steering column, now every thing works fine.
how many amps should the high beam have
i tried that and didnt work whats is next?
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