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Reverse lights and overdrive not working (Need More Info)

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Old 07-22-2011
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Reverse lights and overdrive not working (Need More Info)

ok so my reverse lights have not worked since i got the car and so far i have tested the fuse with a voltmeter and i have power to the fuse. I read online it might be something wrong with the switch on the transmission, i checked the plugs on the driver side and didn't find any breaks just to be sure can anyone else give me info on what i should be looking for.
 
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Old 07-22-2011
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Are you checking the right fuse? I know on a 2000 it is fuse 6 on the side of the dash. (it should be 15 amps, light blue color). If both of those systems aren't working it points to the fuse. Also make sure the fuse is seated properly.


BTW the first pic (harness unplugged) is the digital transmission ranger sensor, the second is your vehicle speed sensor.

It also helps if you would update your signature to show us what vehicle you have. See mine below
 
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Old 07-22-2011
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book says Reverse lights and overdrive is fuse 26 which is a 10 amp fuse, i've stuck 2 different 10's and there and got nothing so i don't believe it is the fuse.

And i unplugged the range sensor just to make sure there wasn't too much dirt in there, i'm curious as to know where the switch is on the transmission that flips the reverse lights on. i've also checked all the wires going to the lights and found no wear or breaks. so is what im looking for in my picture if not where is it located?
 
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Old 07-22-2011
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The range sensor is the switch for the lights. Its kinda like an ignition switch, different things turn on and off at each position.
 
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Old 07-22-2011
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well went into advanced auto parts and they don't sell the switch so i guess off the the junkyard.
 
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Old 07-22-2011
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Yeah they do.
http://shop.advanceautoparts.com/web..._562149479____

Your not gonna get one by asking "digital transmission range sensor" becuase that is what ford cause it. In general they are called "neutral safety switch".
 
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Old 07-22-2011
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Awesome, gonna work on that tommorrow
 
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Old 07-22-2011
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Before you spend your hard earned money on that part, lets make sure its the culprit. I have alldata on my laptop (it has a bad battery and a short in the power cable so I'm gonna see if i can get it to come on tonight). I should be able to give you a step by step guide on how to find whats wrong. All you should need is a good multimeter, but you mentioned you already had one so you're ready to go
 
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Old 07-23-2011
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alright although i do have a sneaking suspicion that it is Nuetral Safety switch because i also have problems shifting from reverse to drive, sometime it sticks.
 
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Old 07-23-2011
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Ok this diagram is pretty close to what you have ( i couldn't get my laptop up and running). You should be able to disconnect your neutral safety switch and with the key on see if there is 12V on the Purple/orange stripe wire. If you get 12V that means you've eliminated all the wiring up to this point.

Next:
Put the truck in reverse and and have the key still on (don't have the engine running obviously and I would suggest to set your ebrake. Then probe the Black/Pink wire to see if you are getting 12V, if you don't then it is your switch.

Now to check for a ground pull out your tail light and locate the socket for your reverse bulb. See if the black wire (solid color) is showing continuity to a known ground (ie the frame). If it does show little to no ohms of resistance then this eliminates the possibility of a bad ground.
 
Attached Thumbnails Reverse lights and overdrive not working (Need More Info)-diagram_backuplights.jpg  
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