Question about 1995 Ford Aerostar

6 Answers

1995 ford aerostar headlamps

Headlamps will not go on. All other lights, including highbeams, work fine. I replaced the headlight switch, verified all connections (including those for the switch) were clean and tight, and double-checked all fuses. Still no headlights!! Any ideas?

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  • bkccorp Jun 22, 2008

    Headlamps were the first part(s) replaced. Is there a relay that I'm missing somewhere? It seems I've heard of this condition before on 90's era Fords, but never paid attention to the solution.

  • bkccorp Jun 23, 2008

    micromaster -- you were correct re: 2nd "fuse box" under hood. Please repost solution so I can accept.

    Thank you !!


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6 Answers

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Check fuses fuse holder and lighting switch

Posted on Jun 22, 2008

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Basically there are TWO fuses, one for each headlight. The
15A fuses are in the battery junction box, which is right next to the battery.

If both hi and lo beams do not work, then it's most likely the +12V source through the fuses to the bulb. Lo and Hi are separately selected, through the switch on the steering wheel, through ground.

This is the area you will check & then u will fix..

Let me know..

Posted on Jun 22, 2008

  • 3 more comments 
  • micromaster
    micromaster Jun 22, 2008

    Basically there are TWO fuses, one for each headlight. The
    15A fuses are in the battery junction box, which is right next to the battery.
    If
    both hi and lo beams do not work, then it's most likely the +12V source
    through the fuses to the bulb. Lo and Hi are separately selected,
    through the switch on the steering wheel, through ground.
    This is the area you will check & then u will fix..
    Let me know..

  • micromaster
    micromaster Jun 22, 2008

    if you need more assistance let us know.. it seems you never give us some of your updates..

  • micromaster
    micromaster Jun 25, 2008

    Basically there are TWO fuses, one for each headlight. The
    15A fuses are in the battery junction box, which is right next to the battery.
    If
    both hi and lo beams do not work, then it's most likely the +12V source
    through the fuses to the bulb. Lo and Hi are separately selected,
    through the switch on the steering wheel, through ground.
    This is the area you will check & then u will fix..
    Let me know..

  • micromaster
    micromaster Jun 25, 2008

    good to know that you finally get a solution...

    BTW is your problem out there was almost done, & solved now..?

    Let me know...


  • micromaster
    micromaster Jun 25, 2008

    and to Richie_asg1, thanks for updating me..

    see yah around...

    micro


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Hi there!

First check with a meter or test lamp that you are actually getting 12V at the switch contact.
There is a common problem on fords that they will not take uprated lights. This results in melted column switches before the fuse blows.
This was rectified on later models by fitting a relay as you describe.

If you don't have 12V at the switch, then remove the fuse panel to check the back of the fuse, and the wiring there.
If you do have 12V at the stalk contacts, then the relay is usually located in the engine bay fusebox.
If you trace the wires from the lights, they should go straight to it. You may have to dismount the fuseboard to see underneath properly. Worth checking all those fuses too!

Posted on Jun 22, 2008

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Http://www.ptdoityourself.net/tl/tl_index2.html#8l

direct link to diagnose the headlight problem urself.i m giving u the link because u hve tried checking everthing with no success so its better to understand where the problem lies exactly .the link will give u exact information an solution to repair it urself with step by step instructions.
feel free 4 further assistance .rate the particular experts solution as fixya that helps u understand n solve ur problem

Posted on Jun 22, 2008

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Check the connection on the switch to turn them on, possibly a piece of metal broke off and there isn't a closed connection.

Posted on Jun 22, 2008

  • Benjamin Patri
    Benjamin Patri Jun 28, 2008

    If you are satisfied with your experience here, then feel
    free to provide me with some feedback by rating my solution. If you need any
    more help, I would be glad to assist you, just ask.



    Thanks for your time and service and I hope you have a Great Day!




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Did you try changing that head light because base from what you have said everything is correct the connections and there's no busted fuse....

Hope that helps...

Posted on Jun 22, 2008

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Headlights do not work.


from the diagram I looked at, voltage to headlamp switch is hot all the time. The headlamp switch has an internal circuit breaker. When you turn on headlamps, the voltage goes from headlamp switch to dimmer switch then to the headlamps. You could have problem with dimmer switch?
headlamp switch assembly-snmzcihstaedp1td4dwemzwq-4-0.jpg

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Why doesn't my speedometer/odometer, horn and headlights work?


Which insturment cluster does your's have ? electronic instrument cluster or standard instrument cluster !

Standard insturment cluster - speedo / odometer
Speedometer/Odometer
The speedometer and odometer provides speed information based on a speed/distance pulse signal from the vehicle speed sensor (VSS). The VSS is mounted on the speedometer driven gear in the transmission.
Could be the VSS is bad .
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VEHICLE RELAYS Operation Diagnosis .

Which headlamps don't work ? Low beams , high beams , both ?
  • The high beams are inoperative
  • Bulbs.
  • Circuitry.
  • Multifunction switch.
  • GO to Pinpoint Test C .
  • The low beams are inoperative
  • Bulbs.
  • Circuitry.
  • Headlamp switch.
  • Multifunction switch.
  • LCM.
  • GO to Pinpoint Test D .
Principles of Operation
NOTE: Due to varying wattage ratings and resulting current draw, certain aftermarket headlamp bulbs may cause the lighting control module (LCM) to shut down the short circuit protection, resulting in the low beams becoming inoperative. Verify that the headlamp bulbs meet Ford specifications.
Headlamp System The headlamp system consists of:
  • two aerodynamic halogen headlamp bulbs and retainers
  • headlamp switch
  • multifunction switch
  • lighting control module (LCM)
  • circuit wiring and circuit protection
In normal operation:
  • With the multifunction switch in the low beam position, power is supplied by the LCM to the low beam elements through the multifunction switch.
  • With the multifunction switch in the high beam position (forward detent), power is supplied to the high beam elements and to the high beam indicator in the instrument cluster.
  • When the multifunction switch is pulled toward the steering wheel, the flash-to-pass switch (part of the multifunction switch) is closed and power is supplied to the high beam elements. When the switch is released, they return to low beam operation.
  • The battery saver feature of the LCM will automatically turn off the courtesy lamps, demand lamps, headlamps, or parking lamps under the following conditions:
    • The ignition switch is in the OFF position.
    • The headlamp switch is in parking lamps ON or headlamps ON positions.
    • After 10 minutes.
Headlamp Switch The headlamp switch is a multi-position switch.
  • The positions include OFF, PARK, and HEAD.
  • With the headlamp switch in the PARK position (first detent), a signal is supplied to the LCM which powers the front parking lamps, the tail lamps, the side marker lamps, and the license lamp.
  • With the headlamp switch in the HEAD position, power is supplied to the headlamps through the LCM and the multifunction switch.
  • The panel dim switch (part of the headlamp switch) is located above the headlamp switch. The panel dim switch operates only with the parking lamps or headlamps on.
  • When the panel dim switch is held in the up position, the instrument panel lighting will progressively brighten.
  • When the panel dim switch is held in the down position, the instrument panel lighting will progressively dim.
For additional information, refer to Section 413-00 .
Headlamps On Warning Chime If the headlamp switch is left in either the PARK or HEAD position and the driver door is opened, the LCM will sound a headlamps on reminder chime when the following conditions occur:
  • The ignition switch is OFF with the ignition key out.
  • The driver door is ajar.
For additional information, refer to Section 413-09 .

Inspection and Verification
  1. Verify the customer concern by operating the system.
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Headlamp switch
  • Central junction box (CJB) fuse(s):
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    • 15 (15A)
    • 21 (15A)
    • 23 (15A)
    • 27 (20A)
  • Battery junction box (BJB) HI-BEAM HEADLIGHTS (20A) fuse
  • Circuitry
  • Headlamp bulb
  • Lighting control module (LCM)
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1 Answer

Twilight sentinel will not work; now headlight and tail lights won't come on; interior lights still work with knob. Do you think it is the F-switch? Also, where can I get a schematic of how to ins


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• The ambient light sensor detects darkness.
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The F- switch is just an input from the LCM - lamp control module .
Do you know how to test control module inputs an outputs ? Very easy to fry a module if you don't know how to do it .
Also have a full scan of all modules on the vehicle , could have DTC'S - diagnostic trouble codes stored . Not for the OBD 2 engine computer . The instrument cluster , BCM , LCM can all set codes too, related to lighting an someother thing's .
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Electric Testing Techniques You Need to Know

You can find free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine ! Under system click on lighting ,then under subsystem click headlamps . Click the search button then the blue link . The first diagram you will see at the top the power supply to the LCM , down a little you will see the headlamp switch , ambient light sensor . Now if you want to start replacing thing's without testing good luck !

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Symptom Chart, Headlamps HEADLAMPS Condition Possible Source Action
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