2007 Passenger side low beam problem
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2007 Passenger side low beam problem
I have a 2007 Ford Escape with a passenger side low beam that won't turn on when the headlights are turned on. I have replaced both low beam lights and checked all the fuses. Fuses are ok,none are burned out. My high beams work perfectly as well as my fog lamps. I need any and all advice and information , including any simple wiring diagrams that could be of use . Is it possible that the multi function switch for the turn lights and headlights is the problem?. If so where could i get one and whats the cost?. Thanks
Fleet Mechanic
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From: Burleson, Tx
Have you checked the socket for power when the switch is in the on position?
I know you say the light isn't working but I would start with the socket first and work backwards.
Also checking for power at the fuse would be a good place.
I know you say the light isn't working but I would start with the socket first and work backwards.
Also checking for power at the fuse would be a good place.
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I don't have a wiring diagram so a little limited, if you have 4 headlight fuses (2 for high beam, 2 for low), then swap the low beam fuses over to confirm each is good, some times a visual inspection doesn't show a broken fuse.
If the same fuse for each headlight low and high beam then as far as I can see that points to a broken wire from the point at which they split to each low beam feed to the inop low beam - looks like a single headlight relay and single-pole switching is used on the earlier models, can't confirm on your year without a wiring diagram I'm afraid.
If the same fuse for each headlight low and high beam then as far as I can see that points to a broken wire from the point at which they split to each low beam feed to the inop low beam - looks like a single headlight relay and single-pole switching is used on the earlier models, can't confirm on your year without a wiring diagram I'm afraid.
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From: St Louis
Is it possible that the multi function switch for the turn lights and headlights is the problem?
you have 4 headlight fuses (2 for high beam, 2 for low),
The individual circuits are all controlled individually by the SJB. You can check for power at the individual outputs of the SJB for each bulb circuit to see if it's a wiring concern or if the fault is internal to the SJB. The SJB is not readily a DIY repair if it must be replaced as it requires programming.
CAUTION: Do not jump to any conclusions regarding the SJB!!!! Follow the diagnostic procedure!!!!
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I have checked the fuses on my 2007 escape and they are all working with none burned or blown. I also checked the low beams for voltage with the key in and turned on. Using a multimeter, i got a reading of 11.9 volts at the left low beam and a reading of 7.5 on the right low beam. I also tried swapping out both new and old bulbs on the right with low beams turned on, same result no light on the right side. Would it be advisable to run new wiring (positive and negative ) from the left low beam directly to the right low beam?. If not , then what else should i do ? Thanks
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Fleet Mechanic
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From: Burleson, Tx
I would think running a wire like that could overload something. Either the smart junction box or the wiring to the other headlight. The cars of old would have been ok with this, no doubt.
I hate saying this but someone skilled in wiring might be in order so they can track down here the issue is and fix the cause of it.
I don't know what all the SJB runs but if you are able to replace it without issue, at least for testing, this would be the direction I'm leaning.
I hate saying this but someone skilled in wiring might be in order so they can track down here the issue is and fix the cause of it.
I don't know what all the SJB runs but if you are able to replace it without issue, at least for testing, this would be the direction I'm leaning.
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From: St Louis
If you slave the two headlights onto one circuit, the SJB will probably flag the attempt to draw double current off one output as a fault and may shut that down also.
Did you check that by back-probing the wire or did you measure that with the bulb's connector disconnected?
I also checked the low beams for voltage with the key in and turned on. Using a multimeter, i got a reading of 11.9 volts at the left low beam and a reading of 7.5 on the right low beam.
Hotshot
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From: St Louis
Okay, you were measuring "open-circuit" voltage which is not going to be enough for this diagnosis. Since the bulb isn't lighting up at all, I'd assume that an in-circuit measurement would be zero at the bulb.
Check the voltage at the output of the SJB with everything connected and the low beams on. That will tell you if the problem is the SJB or the wiring between the SJB and the headlamp connector.
You may want to contact forum advertiser Circuit Board Medics and see if they have any specific history with your particular symptom. If anyone around here would have intimate knowledge of how the SJB works internally, they'd be the most obvious source.
Check the voltage at the output of the SJB with everything connected and the low beams on. That will tell you if the problem is the SJB or the wiring between the SJB and the headlamp connector.
You may want to contact forum advertiser Circuit Board Medics and see if they have any specific history with your particular symptom. If anyone around here would have intimate knowledge of how the SJB works internally, they'd be the most obvious source.
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Thanks for your time and interest Shawn Harris
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