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1994.5 - 1997 7.3L Power Stroke Diesel  

No reverse lights?

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Old Dec 4, 2023 | 05:00 PM
  #1  
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No reverse lights?

Hey guys, I am getting my truck ready for inspection after doing a ton of restoration work and realized my back up lights aren’t working, I do recall them working in the past but not sure when exactly they stopped working, everything else in my truck works great, so this is a nuisance, I recently replaced my steering column but I’m not sure if that has anything to do with it or not, any help would be appreciated!
 
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Old Dec 5, 2023 | 05:51 AM
  #2  
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Make sure it is plugged into tranny
 
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Old Dec 5, 2023 | 08:11 AM
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trailer plug filled with water?
Do you have all your frame grounds?
bulb ok?
 
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Old Dec 5, 2023 | 10:09 AM
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Bulbs are good, I don’t really have a trailer plug that I know of, they guy I bought it from wired a plug for a fifth wheel into the bed so I’m not sure where the normal plug would be, the sensor is plugged into my tranny, I pulled it out and checked it to see if anything was wrong but it was good
 
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Old Dec 5, 2023 | 01:47 PM
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in bed plug can fill with water
did you own out the trans sensor?


https://www.ford-trucks.com/forums/1...am-needed.html
wiring of it
 
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Old Dec 5, 2023 | 04:48 PM
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I will have to take a look at that, if that isn’t the issue, is there anything else it could be? Could it have anything to do with me swapping my column out or no?
 
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Old Dec 6, 2023 | 08:18 AM
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Did you reset the MLPS to correct position?

attached the wiring diag too
 
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Back up diagram.pdf (55.8 KB, 35 views)
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Old Dec 6, 2023 | 08:41 AM
  #8  
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What do you mean reset to the right position?
 
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Old Dec 6, 2023 | 11:34 AM
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I have to ask, have you checked the fuse?
 
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Old Dec 6, 2023 | 12:17 PM
  #10  
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Yes I have checked the fuses and they are good
 
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Old Dec 19, 2023 | 05:13 PM
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IIRC, there is something in the 3rd light on the cab for this?

If that bulb is burned out I think the reverse lights dont work.

Going off really bad memory here.
 
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Old Dec 20, 2023 | 06:03 AM
  #12  
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I actually found the problem, or what I believe to be the problem, I took off and tested the MLPS (switch on side of transmission that activates reverse lights) and when I tested the corresponding posts they came back with an open line, so I think something may have shorted out inside the switch, I ordered a new one so hopefully that will fix the issue
 
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Old Dec 23, 2023 | 08:10 AM
  #13  
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Let us know if that fixes the problem.
 
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Old Dec 30, 2023 | 03:39 PM
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Okay guys, I replaced that switch finally and didn’t fix the problem, then I replaced and rewired the plug going into the neutral safety switch and that also didn’t work, I’m still trying to think about what else it could be, unless there would be a break in a wire somewhere or something is disconnected but I don’t know if you guys have any other suggestions or ideas?
 
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Old Dec 30, 2023 | 06:12 PM
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I would perform a continuity test to verify that the wiring does not have a break.
 
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