Dash back lighting inop in cooler/ cold weather

Glenn Owner/Technician Texas Posted   Latest   Edited  
Resolved
Electrical
2003 Lincoln Aviator 4.6L (H) 5-spd (5R55S)
Dash/ Gauge Lighting

Hello DN Folks,

Cooler weather is finally coming to South Texas, so out come the electrical gremlins. 

On this Lincoln Aviator, only during cooler weather in the mornings, the dash back lighting will not work. The gauges all work, but can barely be seen Once the vehicle has run for a while, the dash back lighting would suddenly start working without issue until the next morning.

Being that it is temperature related, I am suspecting it is likely a connector issue, but trying to avoid doing a full exploratory unless I have to. 

If anyone has some experience with this issue on a Lincoln Aviator or similar model, I would appreciate your input.

There are no related codes 

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Stephen Owner/Technician
California
Stephen
 

If you work the dimmer, do the lights come back? Perhaps it's a dirty rheostat

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Helpful
Glenn Owner/Technician
Texas
Glenn
 

Thanks Stephen, I will check that, but I think it did not make any difference early last Spring, then the weather warmed up and the issue went away.

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Raymond Mobile Technician
Michigan
Raymond
 

Hi glen , can’t say I experienced that model , but my question is what happens if u put heat gun near it and then immediate difference with back of ice just to prove that it is temp related and u can get consistent failure and normal operation ?

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Stephen Owner
Florida
Stephen
 

If the control button illumination on the dash and console (heat / A.C. or accessories) are also dis-functional, then I think you can rule out the Instrument Cluster. I also agree with Stephen Malfatti. If I can think of anything else I send another posting.

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Matthew Owner/Technician
Oregon
Matthew
   

These types of things are perfect for using the old snap on/blue point choke checker. It only uses air, one side heat, the other side cold. It speeds up diagnostics quite a bit.

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Agree
Raymond Mobile Technician
Michigan
Raymond
 

Hey matt, do u know if snappy still can get that device?

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Matthew Owner/Technician
Oregon
Matthew
 

I don't think they are sold any more but I'm sure you could find one on ebay or something. I think the number was YA862 for the snap on version. It has to be one of the funnest tools that I own.

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Glenn Owner/Technician
Texas
Glenn
 

Hi Matthew, Snap On discontinued them back in the late 80's because techs were causing damage to components and it got them (Snap On) in trouble. It was a great tool as long as people exercised caution.

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Sherman Owner
Texas
Sherman
 

I just love being protected from myself! ;)

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Funny
Geoff Diagnostician
Hawaii
Geoff
 

You made me think of this one Sherman,

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Sherman Owner
Texas
Sherman
 

Just think! There obviously HAD to be a problem with someone drinking battery acid, or they wouldn't put the warning in the owner's manual!

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Phil Technician
Massachusetts
Phil
 

I believe they are long discontinued. You may get lucky on Ebay or Facebook Marketplace, or possibly Craigslist, as well as at a flea market or something like that. Snap-On was a YA862. It is a vortex tube. exair​.​com/products/vorte… Pretty handy to have to heat or cool something. The noise gets annoying from the air rushing out, but you usually aren't running it for super long…

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Glenn Owner/Technician
Texas
Glenn Resolution
 

This one has been a bit of a pain, but I will figure it out, closing for now.

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