Fuses for upfitter switches? - Diesel Forum - TheDieselStop.com
2008- 2010 General Questions General questions related to 2008-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

 
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post #1 of 7 (permalink) Old 01-04-2012, 07:47 PM Thread Starter
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Fuses for upfitter switches?

Quick question.. I have my train horn wired to my #1 upfitter switch, and until today worked fine. The indicator light on the switch itself lights when activated but would it light if the fuse is blown? And where are the fuses for the switches? My truck is an 08 F450, thanks again guys!
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post #2 of 7 (permalink) Old 01-05-2012, 09:10 AM Thread Starter
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come on guys i know this is probably a stupid question, but not sure that the fuse would be blown on the upfitter switch if the indicator on the switch handle lights! please help
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post #3 of 7 (permalink) Old 01-05-2012, 09:34 AM
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Come on dude! This is a forum, not tech support.

The fuse that powers the lights in the switches is independent of the fuses that protect the circuits the switches control. If all of the switches light up that indicates that the switches are working properly.

Assuming that his truck is a 2009 (2008-20010 are likely the same) the two 30 amp fuse for switches #1 and #2 are in the power distribution box under the hood. The fuses for switches #3 and #4 are located in the smart junction box (fuse panel in the right kick panel under the right side of the dash) The schematic for 2009 lists switch #4 is fuse number F16 - 15 amp.

Consult your Owner's Guide for accurate fuse information or provide us with the model year of your truck.


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post #4 of 7 (permalink) Old 01-05-2012, 10:27 AM Thread Starter
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Thanks dude! LOL I appreciate it after tracing down the power feed , found a broken wire spliced and soldered alls good, I did mention the truck before and the trucks new to me unfortunetly didnt come with owners manual

I appreciate the help though Doc!! just trying to learn little more Its an 08 F450 4x4 best truck Ive owned yet.
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post #5 of 7 (permalink) Old 01-05-2012, 11:13 AM
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No problem, glad you got it fixed.


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post #6 of 7 (permalink) Old 06-14-2018, 08:29 PM
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Thanks guys. First diesel. I know not typical forum discussion but this thread was helpful! Appreciate your patience with the newbies!
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post #7 of 7 (permalink) Old 03-25-2019, 08:30 AM
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There are also fuses in the upfitter switch module that installs on the driver side of the instrument panel near the parking brake. The fuse for the upfitter switch module on the passenger side is for the entire module, not for the individual circuits. Chances are you have a blown fuse at the upfitter switch module itself.

Last edited by klhansen; 03-27-2019 at 11:43 AM.
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