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Ignition switch? Door latches? Interior light coming on when hitting bumps in the road

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Ignition switch? Door latches? Interior light coming on when hitting bumps in the road

 
  #1  
Old 01-14-2019, 01:04 PM
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Ignition switch? Door latches? Interior light coming on when hitting bumps in the road

Wondering if anyone else has ever had similar issue and might be able to give me someplace to start....
Recently I have had the interior light above the rear view mirror come on along with the outside lights under the side mirrors when I have hit hard bumps and chuck holes while driving.
It seems to go through the same sequence after first getting in and starting the truck.
I took the steering column trim off and cleaned the ignition switch first with contact cleaner and then a shot of aerosol silicone spray.
Then I took the wiring connection off the switch, looked it over, cleaned, and re-assembled that with a small zip tie wrapped around to hopefully help keep everything hooked and connected.
Still had it happen afterwards so I started wondering if it was a door switch.
Obviously I don't see the old plunger style pin switches that popped into my head when I first started trying to think of what would cause this.
Guessing the latch assemblies must have switches integrated into them so I again sprayed contact cleaner then silicone into the openings I could access.
Again, still have the lights pop on after enjoying a hard thump from the lovely roads in my area.
(note: sarcasm since the roads are terrible here ! ! ! )
So before I get too carried away, thought I would see if there was any help here since I get pointed in the right direction when I am at least smart enough to ask

Thanks very much !!!
 
  #2  
Old 01-16-2019, 11:48 AM
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2 days in a row I hit the same bump, same spot, and the "dome" light pops on.
I let it go for a while, then shook my key in the ignition switch.
It slowly faded off after the shaking.
Guessing there must be something in the ignition switch then...
I also hear something switching on/off whenever the sequence of the interior lights going on/off.
Thinking there must be a relay somewhere in the steering column in this set up too.
Maybe I will look into replacing the ignition switch and see if that is the issue when it gets warmer around here.
 
  #3  
Old 01-17-2019, 09:21 AM
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Kept the key "forward" pushed further clockwise in the tumbler this morning.
No interior light on when I hit "the" bump that had been turning on the lights.
Now I am wondering what needs to be replaced...the ignition switch itself or the tumbler that accepts the key....hmm
 
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Old 03-20-2019, 03:55 AM
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I finally replaced the ignition switch. Seems like it has fixed my dome light from coming on when I hit a bump. I saw some wear on the rotating portion of the switch. The "key hole" shaped pocket that aligns with the tumbler from the right hand/drivers side looked wore enough to make me think it wasn't getting turned far enough to actually engage the switch's mechanism causing the issue.
Now I gotta replaced the headlight switch since that seems to have an internal issue but still works and functions.
AND
Sway bar links in the front...ROTTEN POTHOLES ! ! !
 
  #5  
Old 03-20-2019, 11:45 AM
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Great find! Thank you for following up with what you found the fix to be.

-Rod
 
  #6  
Old 03-20-2019, 11:57 AM
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Switch was cheap and easy enough.
Couple trim pieces off the steering column and a couple electrical plugs was most of it.
Was fearing the tumbler portion was needed, but not looking like it.
 

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