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Old 03-23-2019, 12:46 PM   #1
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Mods on my 2015 Seneca

I bought a 2015 Seneca 37TS used and the original owner made a couple modifications Iím trying to figure out.
1. See 1st pic. Thereís a knob that looks like a volume knob mounted on lower side of dash left of steering wheel. The wires run out thru the steering column hole into the engine compartment but I canít follow them without cutting a lot of zip ties.
Maybe the former owner is on here and can explain this.

2. Thereís a remote control, pic 2, attached to drivers door.
Under the hood, I found the piece it communicates with. This ihas a cable like a lawn mower throttle cable the runs down to the front center of the fan on the engine.
Any ideas what this might be doing?
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Old 03-23-2019, 02:28 PM   #2
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The third pic up by the fan looks like a solenoid activated air valve and a keyless remote to activate it. Are the 2 lines that go to the lower part look like air lines? And can you trace where they go? Just a guess, possibly a rear air dump??? The dial, I have no idea and hard to say other than tracing the wires. You could use a wire tracer to keep from cutting things open.
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Old 03-23-2019, 03:44 PM   #3
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The dial under the dash could be a high idle switch or a shift on the fly tuner switch to change between tunes (at least these are how a lot of diesel truck owners have theirs set up)

To check the high idle, have motor running with parking brake engaged. Turn dial to see if idle speed increases.

If a tuner SOTF, there should be distinct clicks as you turn the dial. First click is lowest power setting, last click is hot rod mode. (Iím doubting if your MH has a tuner)
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Old 03-23-2019, 03:44 PM   #4
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Quote:
Originally Posted by Rustynuts View Post
The third pic up by the fan looks like a solenoid activated air valve and a keyless remote to activate it. Are the 2 lines that go to the lower part look like air lines? And can you trace where they go? Just a guess, possibly a rear air dump??? The dial, I have no idea and hard to say other than tracing the wires. You could use a wire tracer to keep from cutting things open.
Itís an air line that attaches to the front of the fan
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Old 03-23-2019, 03:48 PM   #5
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Mods on my 2015 Seneca

The remote may be engaging the fan to keep the engine temps down when towing up steep grades?

I remember a mod for the Powerstroke 6.0 that did something similar to turn the fan on before the computer controlled 240F.

So if you were about to go up a long steep grade while towing, you could flip the switch to get the fan cooling down the engine before it got too hot.

Just a guess..
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Old 03-23-2019, 03:56 PM   #6
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Quote:
Originally Posted by Rustynuts View Post
The third pic up by the fan looks like a solenoid activated air valve and a keyless remote to activate it. Are the 2 lines that go to the lower part look like air lines? And can you trace where they go? Just a guess, possibly a rear air dump??? The dial, I have no idea and hard to say other than tracing the wires. You could use a wire tracer to keep from cutting things open.
Why don't I see this third picture. I only see thr 2 the op is talking about?
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Old 03-23-2019, 04:04 PM   #7
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The knob controls this.
https://www.thoroughbreddiesel.com/1290307/?gclid=EAIaIQobChMIoZPiwKGZ4QIVIx-tBh2NigXbEAQYASABEgI5bPD_BwE
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Old 03-23-2019, 04:36 PM   #8
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The dial under the dash could be a high idle switch
Freightliners have a high idle built in. You turn the cruise control switch to the on position and with the engine running you bump the set/accel switch to increase the idle speed, I think you have 3 different rpm increases

The remote setup I would guess since itís connected to the fan that it is a manual lockup for the fan
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Old 03-23-2019, 04:45 PM   #9
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The knob is part of the Styker power module. It increases HP and torque.
I just might get a little better mileage now that I know it isn’t a volume knob and don’t leave it turned up full blast all the time lol
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Old 03-23-2019, 05:13 PM   #10
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Now that I think about it, a remoter valve installed into the air line running to the fan when activated would cut the air supply to the fan, unlocking it.....I canít think of a reason you would want to do this unless the PO didnít like the fan noise when it locks up but itís locking for a reason, to help cool down the motor...
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