Reverse lights
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2nd Gear
Joined: Feb 2023
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Reverse lights
I own a 91 F-250 with an E4OD Trans. I currently can get the reverse lights to come on if I apply a little pressure down on the gear select on the column (not ideal as bumps and such revert it to the position where the lights are not on). There is some play throughout the gear selector arm and im not sure if this is an issue with the position sensor on the transmission or if it is just the extra play throughout. Dont know if there is a procedure to troubleshoot or what exactly can be adjusted to fix this without getting too carried away (in short preferably looking for an easy solution) Curious if anyone has experienced this specifically and what steps a person can take. I've read plenty about the MLPS though I don't think this is the issue because from what I understand I wouldn't have reverse lights at all if it were the issue. Also to add I have played with the shift arm underneath (havent touched or adjusted anything) and there is some slop but mostly from the bushings
Mountain Pass
Joined: Nov 2014
Posts: 237
Likes: 11
First thing - have you checked the MLPS adjustment ? That was causing my E4OD to slip at highway speeds. I don't know where the switch that turns on the reverse lights is, but I suspect it is the computer seeing the trans in R. The adjustment is easy to see and do, just involves crawling under and light.
Logistics Pro
Joined: Nov 2013
Posts: 3,928
Likes: 1,199
From: Mojave, Ca
The MLPS has a dedicated electrical circuit inside to control the Reverse lights. 12V goes to from the Fuse Box to the MLPS. When the shifter is moved into "reverse", the circuit inside the MLPS is completed, and 12 volts is sent to the reverse lights.
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2nd Gear
Joined: Feb 2023
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Alright, sort of figured there may be some adjusting needed and wasn't sure what to start with. With all you guys have provided I think I have a better idea of how to handle this. I'll see what I can do
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