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Upfitter Switch Help

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Old 02-22-2005, 07:37 PM
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Upfitter Switch Help

I have the 4 aux switches in my dash and was looking for some help. I was getting ready to install some o/r lights using the aux switches but somehow I lost power to the whole switch, none of the 4 light up when flipped on.

I checked every fuse related to the upfitter switch but still no luck. They were working ok so maybe I blew a fuse or something. Each sw has its own fuse number and then there is one upfitter control fuse but all fuses are good.

Does anyone know where I might look for the power wire that supplies the aux switches? I know the colors coming from the plug but I don't have the service manual.

I'm really surprised Ford made it tough to connect items to these switches. Upfitter switches are not even covered in my owners manual.
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Old 02-22-2005, 07:48 PM
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I too was not happy with no info from Ford on the upfitter switch. I also thought it silly they have a AUX button on the Radio that I assumed would be a cool place to plug into. After I buy I find that it takes a special harness not available yet to do what I thought would be a simple RCA plug.
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Old 02-22-2005, 08:07 PM
93-331-29PSI 93-331-29PSI is offline
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What is the OEM ford part number on your upfitter switches?
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Old 02-22-2005, 08:29 PM
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Climo

Open your glove box all the way so it swings down to the floor. Look directly up and remove the cover on the black box. There are some fuses and relays for the upfitter control box there.

In your owners manual is info on exactly what positions the four upfitter fuses have in the Mian Circuit panel fuse block.

Be sure to not have more than 8 amp continous draw on either of the two small upfitter wires and no more than 22 amps continous on either of the two heavy upfitter wires.

Yes they are MAX rated at 10 amps and 30 amps but you need some over head to prevent blowing fuses and relays.
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Old 02-22-2005, 08:31 PM
Slipperyrock Slipperyrock is offline
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What is tough about hooking up to the upfitters? I was told the 4 wires located under the hood by the drivers hinge are the upfitter connection points. Just splice/solder to them and you have power. If the wires I mentioned are the wrong ones I am sure someone will be along shortly to correct me. I have not tried to hook mine up yet. As to why yours aren't working...sorry I can't help you there but something may have shorted out while you were making the connections???
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Old 02-22-2005, 08:42 PM
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Talking

Quote:
Originally Posted by Fredvon4
Climo

Open your glove box all the way so it swings down to the floor. Look directly up and remove the cover on the black box. There are some fuses and relays for the upfitter control box there.

In your owners manual is info on exactly what positions the four upfitter fuses have in the Mian Circuit panel fuse block.

Be sure to not have more than 8 amp continous draw on either of the two small upfitter wires and no more than 22 amps continous on either of the two heavy upfitter wires.

Yes they are MAX rated at 10 amps and 30 amps but you need some over head to prevent blowing fuses and relays.
Perfect....exactly what I was looking for. I will check it in the am. Hopefully this will cure my problem. I'll post pics when I get a chance.
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Old 02-22-2005, 08:43 PM
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The wires under the hood are not the upfitter switches.Those wires just go through the firewall.You can connect on either end so you don't have to run your own wires through the firewall for any accessories.
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Old 02-22-2005, 08:47 PM
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Quote:
Originally Posted by Slipperyrock
What is tough about hooking up to the upfitters? I was told the 4 wires located under the hood by the drivers hinge are the upfitter connection points. Just splice/solder to them and you have power. If the wires I mentioned are the wrong ones I am sure someone will be along shortly to correct me. I have not tried to hook mine up yet. As to why yours aren't working...sorry I can't help you there but something may have shorted out while you were making the connections???
The 4 wires which you mention are only "pass through" wires. They go from one side of the firewall to the other. There are no connections on either end.

For some additional information about the Upfitter switches, check out this thread.

Jim
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Old 02-22-2005, 08:50 PM
morcutt morcutt is offline
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Here is the schematic link again, if anyone needs it. I think that it's been posted a few times already.

https://www.fleet.ford.com/truckbbas/non-html/Q117.pdf
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Old 02-22-2005, 08:53 PM
Slipperyrock Slipperyrock is offline
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Thanks, I realize that the wires are not "switches". I was just pointing out that you tap into the circuit under the hood. I hadn't really thought of tapping into the fuse box for stuff that doesn't need to go through the firewall.
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Old 02-22-2005, 09:08 PM
Slipperyrock Slipperyrock is offline
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I started reading the link above...looks like I have a little more wiring to do than I thought. I was wondering why Ford would leave hot wires sitting under the hood un-protected. Thanks guys.
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Old 02-22-2005, 09:29 PM
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Slipperyrock

If we are talking about the same wires under the hood (red,black,blue,white) they are not live.If you look under your dash behind your fuse panel, you will see the same wires not connected to anything.You can use them as a connection through the firewall without running your own wires.
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Old 02-22-2005, 10:55 PM
Slipperyrock Slipperyrock is offline
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Thanks Jello, you saved me some time later on figureing out why my stuff doesn't have any power.
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Old 02-23-2005, 07:01 AM
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Also check this out
https://www.ford-trucks.com/forums/s...d.php?t=303583

scroll down the page
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Old 09-28-2008, 02:00 PM
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In regards to these upfitter switched, I too have had an issue with all four wires being hot. With the engine running and all 4 switches in the on and lit position, there is no power at any of the but ends as described in the manual. Fuses are good including the 1 5 amper behind the glovebox. We decided to just run our own wires by tapping in right behind the upfitter switched. We now have our own switched power but am wondering if this might have created any other problem. Are the wires that are factory run with the blunt ends on the any different than simply running your own?
Thanks, John
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