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Back up lights

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Old Dec 5, 2007 | 08:11 AM
  #1  
WeGoOn3's Avatar
WeGoOn3
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Back up lights

Does anyone know what to check to find out why back up lights wont come on (other than the bulbs) On my 78 F100?
 
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Old Dec 5, 2007 | 09:29 AM
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From: Colstrip, MT
Also check the neutral safety switch mounted on the side of the transmission(if it is an automatic). The NSS also controls the backup lights.
 
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Old Dec 5, 2007 | 09:36 AM
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Most likely the NSS if out of adjustment. Or if a std the BLS on the trans is bad
 
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Old Dec 5, 2007 | 10:44 AM
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It is an automatic. I'll check the NSS. Should'nt be too hard to fix that. Never put one on before though.
 
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Old Dec 5, 2007 | 11:30 AM
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To test the bulbs and wiring you can always jump 12v to the circuit.


My guess , it needs cleaning or replacing.

I clean the ones I come across ...in this order

1) Varsol and a brush
2) compressed air
3) Lacquer Thinner and a brush
4) Compressed air with it wrapped in a rag
5) Electrical cleaner

all the time turning the switch collar to release as much grime as possible

Some people actually take them apart and then TRY to get them back together securely.
 
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Old Dec 5, 2007 | 02:35 PM
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Awesome, I'll try to clean it if it dosent look somehow broken. Worst case senario; I'll have to get another piece. Advance Auto's website had the part for $42.00. Prob. cheaper at the local store.

Thanks for the help!
 
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Old Dec 5, 2007 | 04:06 PM
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In some cases the wire gets so brittle they break off from vibration.


Ford should have had a proper covering on those wires due to their location.


 

Last edited by Mil1ion; Dec 5, 2007 at 04:39 PM.
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