General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Left tail light doesn’t turn on for auto lights

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Old Jan 21, 2023
  #1  
Tperk93's Avatar
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From: Columbia, SC
Left tail light doesn’t turn on for auto lights

Hello all,

my left rear tail light (not turning/brake light) is not turning on when the lights are set to “auto”. I found out after buying a replacement bulb the light does work but only when the lights are set to “on” not “auto”. If anyone knows how to fix this or can point me in the right direction I’d greatly appreciate!

2021 XL Ranger stx appearance
 
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Old Jan 21, 2023
  #2  
RonD's Avatar
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Welcome to the forum

2021 is a little to new to get specific issues like this answered

You could buy this book to have: https://www.ebay.com/itm/285079643671

Ford makes a "Shop Manual" set every year for every model it sells, the "Wiring Diagrams" is one book from that set, specific to that year and model

Will have wiring for all sub-models and options that year, so Dealer mechanics can fix problems

Good thing about "Shop Manuals" is that they are FREE, because you can resell it for what you paid when you no longer need it


Park lights are usually on a relay so they can be Flashed when locking or unlocking with a Fob, or turned on with switch, manual or auto
Only having 1 rear Park light not working, assuming a good bulb, would be very very odd
Because there should only be 1 Park wire that goes to the rear of vehicle and its splits to both rear Park lights, 1 wire 2 bulbs, so very odd, which is why you should get the book
 
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Old Jan 22, 2023
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Tperk93's Avatar
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From: Columbia, SC
Thanks for the link and explanation RonD!
 
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