SEIC and Upfitter Switch

[2008screw]

Does it matter which upfitter switch you hook up the SEIC (PTO) wire too?

[loft306]

No but here are what there rated for:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" style="height: 128px;"><pre>
Ford upfitter switches: Ign-Hot-ACC
Aux-1 [30-amp] Circuit No. CAC05 Wire Color: Yellow
Aux-2 [30-amp] Circuit No. CAC06 Wire Color: Green / Brown
Aux-3 [10-amp] Circuit No. CAC07 Wire Color: Violet Green
Aux-4 [15-amp] Circuit No. CAC08 Wire Color: Brown

• Found: above and to the right of parking brake release handle by the relay pack. </pre></div></div>
the above is from: the 2008 SEIC manual LINK
I'd choose #3 or #4

[Grampsride]

Originally Posted by 2008screw

Does it matter which upfitter switch you hook up the SEIC (PTO) wire too?

What is the SEIC wire hooked to one of the upfitter switches for?

[OMCUSNR]

Originally Posted by Grampsride

What is the SEIC wire hooked to one of the upfitter switches for?

Flip the switch on the dash, and the truck up idles to about 1.2k to provide additional load on the engine (helps prevent wet stacking for extended idling and while using the Power Take Off PTO).

OMC

[F450Mikey]

I hooked mine up to the 4th switch. The whole mod took 5 minutes.

[CaptinCrash]

Originally Posted by OMCUSNR

Flip the switch on the dash, and the truck up idles to about 1.2k to provide additional load on the engine (helps prevent wet stacking for extended idling and while using the Power Take Off PTO).

OMC

what is wet stacking

[dswift]

Causes: A diesel engine, like all internal combustion engines, to operate at maximum efficiency has to have exactly the right
air to fuel ratio and be able to sustain the operational temperature it was designed to run at for a complete burn of
the fuel. When a diesel engine is operated on light loads it will not attain its correct operating temperature.
When the diesel engine is allowed to run for extended periods below its designed operating temperature, unburned
fuel is exhausted and noticed as wetness in the exhaust system, hence the phrase “W
et Stacking.”
Engine Effect: When unburned fuel is exhausted out of the combustion chamber it starts to build up in the exhaust side of the
engine resulting in fouled injectors and a build up of carbon on the exhaust valves, turbo charger and exhaust.
An excessive amount of deposits can result in a loss of engine performance as gases bypass valve seatings,
exhaust buildup produces back pressure and deposits on the turbo blades reduces turbo ef
ficiency. Over short
periods permanent damage will not be incurred, but over longer periods damage will occur as deposits scar
and erode key engine surfaces. (see diagram one)
Another result of running below the designed operational temperature is the pistons rings, fitted to the
piston to allow expansion of the piston as the engine temperature rises, do not attain their level of designed
tightness required to adequately seal the space between the cylinder walls. This results in unburned fuel and gases
escaping into the oil pan and diluting the lubricating properties of the oil, leading to premature engine wear
.
Why Avoid: Having discussed the effect of “Wet Stacking” on the diesel engine, the reasons for avoiding the condition are now known, but in addition to the adverse engine effect the designer and user of a system have to consider:
Expense: Excessive “Wet Stacking” will shorten engine life by many years and before planned replacement.
Pollution: Many urban areas are restricting the level of smoke emissions “Wet Stacking” produces.
Power: Even before an engine is damaged deposits will reduce maximum power. A prematurely worn
engine will have a lower maximum power than it was designed to develop.
Maintenance: An engine experiencing the effects of “Wet Stacking” will require considerable more maintenance
than an engine that is adequately loaded.

[Martin #6]

Originally Posted by F450Mikey

I hooked mine up to the 4th switch. The whole mod took 5 minutes.

It's that easy.........simply connecting a couple of wires together?

[budtoh3zo]

yes it is.

[Duramaxfarmer07]

It amazed me how quick and easy this mod is to do took less than 5 minutes all you got to do is find the wire which is not hard to find and then double check its the right one then tripple check..... ect... then splice it and either solder it to the uplifter switch wire or get a wire wire connector.

[compman72]

Originally Posted by Duramaxfarmer07

It amazed me how quick and easy this mod is to do took less than 5 minutes all you got to do is find the wire which is not hard to find and then double check its the right one then tripple check..... ect... then splice it and either solder it to the uplifter switch wire or get a wire wire connector.

Which wire did you use for SEIC?
Is is the yellow/green wire that we need to be using?
I currently have mine hooked to the BCP.

[Martin #6]

FYI. If you have the satellite radio system then the upfitter wires are difficult to find and access. It's much easier to remove the module to make the connection to the upfitter wires.

[Lightningfast01]

I used #4 because it was the lower amp switch and I wanted to save the high current circuits for larger accessories. I just used the purple with green stripe BCP wire. Battery Charge Protection uses a 1200rpm kick up and varies to maintain proper battery voltage if you are using a winch or high current drain accy. Also, BCP does not lock the torque converter. The SEIC does lock the converter.
Upfitter #1 is my air compressor
#2 is one set of aux lights
#3 is a second set of aux lights
#4 is high idle.

I say wet stacking is an old legend linked to pre historic diesels. If you pay attention you will notice the truck modulates its own idle RPM when cold. Engineers have programmed these trucks to maintain a proper burn by calculating intake air temps, oil temps, coolant temps etc.

[compman72]

Originally Posted by Lightningfast01

I say wet stacking is an old legend linked to pre historic diesels. If you pay attention you will notice the truck modulates its own idle RPM when cold. Engineers have programmed these trucks to maintain a proper burn by calculating intake air temps, oil temps, coolant temps etc.

I would also think that with the new style of injectors (able to squirt 5 times/ cycle) that the PCM knows when it is idling and will reduce fuel flow to where the engine is to idle with a minimum amount of fuel.