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Disable 1998 Automatic Headlights

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Old Apr 13, 2016 | 04:55 PM
  #1  
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Disable 1998 Automatic Headlights

I would like to permanently disable the automatic headlight feature on our 98 Mountaineer.

I do not want them to come on automatically or stay on after the vehicle is turned off.

There is a switch located on the mirror. It does not work. This is the mirror that it has.

I do want to retain the automatic dimming mirror feature.

Is it possible to jumper the switch inside the mirror?

 
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Old Apr 13, 2016 | 05:11 PM
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Slide the switch all the way to the left. that will turn off the auto lamps!


Oops. I see that you say it is broken. no idea on that.
 
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Old Apr 13, 2016 | 07:50 PM
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Yeah, doing that does absolutely nothing. I don't think the adjustable delay does anything either.

I'm thinking that the mirror could be opened up and a jumper wire soldered in at the switch. Either that or maybe cut a wire.
 
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Old Apr 14, 2016 | 01:57 AM
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I just found this info, but I have no idea if its correct. I don't want to cut a ground wire that will interfere with the auto dimming mirror.


The white w/Pink stripe (Park Lamp Relay Control) goes to dual brake warning diode/resistor assembly. (Do not cut)
- Black w/Pink stripe (Reverse Input) (to back up, neutral safety) do not cut
- Black (Ground wire) (yes) cut just from the module.
- Light Green w/Yellow stripe (Power *Always Hot) goes to fuse #11 15A(do not cut)
- Red w/White stripe (Ignition *Only Hot at start)
 
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Old Apr 14, 2016 | 03:37 AM
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No idea if yours is the same, but on my 97 white/purple connects voltage from the park/dimmer/headlight relays to the switch in the mirror. The switch just grounds the voltage from the relays.

Theres a very handy connecter in the wire that could be opened.
 
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Old Apr 14, 2016 | 07:14 AM
  #6  
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I'm not sure why the information you found suggests you should not cut the white/pink wire, but thinks cutting the ground is fine. The White/Pink wire is the autosensor output and, based on the description of that signal in the factory wiring diagram, cutting the ground wire would have the same effect as cutting that white/pink wire since the circuit for the sensor would not be complete without a ground for the sensor.

But, also keep in mind that I have never attempted to disable this feature and presumably the person posting that information has.

The white/pink wire goes to the RAP module as well as to the relays for the parking and headlamps. If it were me, I'd track down connector C212 and snip the white/pink wire at pin 49 with enough length that it could be reconnected if necessary. C212 is a rather large square connector above the brake pedal area.

-Rod
 
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Old Apr 14, 2016 | 07:04 PM
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on my 98, i just unplugged the mirror, and done. 100% headlight control with the switch on the dash.
 
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Old Apr 15, 2016 | 11:01 AM
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I've considered just unplugging the mirror, but that will defeat the mirrors dimming ability.
 
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Old Apr 15, 2016 | 11:05 AM
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I never had a problem with the mirror brightness when i unpluged mine, but i have a slight lift.
 
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Old Apr 18, 2016 | 06:32 AM
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Why not find a used one?
 
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Old Apr 18, 2016 | 09:48 PM
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I've read that these mirrors switch is problematic. I figure a used mirror is likely to have the same problem. I also really dislike automatic head lights anyway.
 
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Old Aug 11, 2023 | 06:03 AM
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I disabled mine just an hour ago. Squirt some super glue into there and hold it in the left most position until it dries, now mine won't move at all and it stays off so it doesn't turn my lights on when I don't want it do and it doesn't flicker on and off. Easiest fix ever.
 
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Old Aug 16, 2023 | 10:53 PM
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I guess that would be a solution. Still want to find a different mirror that is a direct swap with the same functions. We've just lived with it being wonky.
 
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