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Old 01-15-2011, 05:49 PM   #29
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I was all excited and put aside time today to examine a hole in the dash next to my ignition switch and solve this mystery...
Sadly, all i could find was a hole, with nothing in it... a look behind with some serious contorsionist moves revealed nothing but a bulb holder that I could not place...
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Old 01-15-2011, 06:23 PM   #30
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What about a power over ride to the tag axel brakes/vac line to cut the cruse, in case main brakes failed? The brake control for the tag in mine is one that is only activated by centripetal force. If your primary brakes failed your tag would do nothing without something like this (button).
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Old 01-15-2011, 06:45 PM   #31
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What about a power over ride to the tag axel brakes/vac line to cut the cruse, in case main brakes failed? The brake control for the tag in mine is one that is only activated by centripetal force. If your primary brakes failed your tag would do nothing without something like this (button).
Correct me if I'm wrong, but I don't remember tag axles on the smaller motorhomes.
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Old 01-15-2011, 06:50 PM   #32
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Good point Vswingfield I was reading all the 345ers giving ideas and forgot it was a 280 thanks.
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Old 01-16-2011, 08:33 PM   #33
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Had a chance to get back under the vehicle today to address a bunch of issues. Unfortunately, the winter sun dropped below the horizon earlier than I expected. So I only had a few moments to check this particular mystery button out further. The button assembly has "DAV, France" on the side of it. The thick cord coming out of the back runs about 20" before disappearing into the cowl along with a bundle of other wires. I'll get into it again sometime tomorow and chase down that major cable.

On potentially a related note, there's a box under my Dash from Dana Corp. See attached image. Any idea what this might be?

Big thanks to all of you, my detective team!

/d
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Old 01-16-2011, 08:41 PM   #34
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Keyair waves his hand in the air.....
Me Sir! Me sir!
Look here!
RV.Net Open Roads Forum: WHAT IS THIS? Dana Corp Precision Controls Division

Aftermarket Cruise Control... from the 80's by dana Corp... explains the switch too!

Edit....
More info...
http://yarchive.net/car/cruise_control.html
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Old 01-16-2011, 08:50 PM   #35
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AAAAlllright!

So I have cruise control (somewhat) installed. That's gotta be good news. Assuming I can get it to work. I'll get back under there and try to trace some of the wires. I'll also assume that everyone was right that this cord was a brake cutoff switch for the cruise.

The million dollar question, though, is where are the controls? None of my stalks have Cruise on them. Would it be possible that this was installed as a dash control panel with some buttons? I'll do some digging...
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Old 01-16-2011, 09:34 PM   #36
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Yep.. The Dana corp box is the control unit (if you want to call it that) for the cruise control. It was aftermarket yes but factory installed (atleast it was on the Brits 280 Diesel). The brake pedal has a dump switch on it too so I wonder why they felt they needed 2 dump switches? Maybe due to the overall size of the rig or something.. safety thing to make sure you could stop it if there was a malfunction?

Smartstream will confirm it cuz Im a trailer guy.. lol.. he will confirm that to..

Good luck..

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Old 01-16-2011, 10:38 PM   #37
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Yep.. The Dana corp box is the control unit (if you want to call it that) for the cruise control. It was aftermarket yes but factory installed (atleast it was on the Brits 280 Diesel). The brake pedal has a dump switch on it too so I wonder why they felt they needed 2 dump switches? Maybe due to the overall size of the rig or something.. safety thing to make sure you could stop it if there was a malfunction?

Smartstream will confirm it cuz Im a trailer guy.. lol.. he will confirm that to..

Good luck..

Vinnie
Ah come on now Vinnie, you just think you are a trailer guy. Back on subject now yes that is the Dana control box. The control switch can be dash mounted or mounted on the turn signal. They were available in different styles to match different cars but all had a flat 4 prong plug that plugged into the loom that went to the control box. Another part of the loom went to a vacuum controlled solenoid that controlled the throttle by way of a sheathed cable. Another part of the loom went to a speed pick up either mechanical or electronic that sent a pulse to the unit and a last part of the loom that went to the brake light switch or a separate switch on the brake pedal that disengaged the unit when the brakes are applied. There was also a 12V + & - lead to power the unit. There was not a separate button on the dash to disengage the unit.

The Dana unit is obsolete and was taken over by Audiovox also obsolete and now has been taken over by Rostra Controls. I'm not sure if that is the full and proper name. The vacuum solenoid is no longer available however they have an electronic solenoid that is one piece including the control unit. Existing turn signal switches and speed pulse generators are compatible and plug right into the Rostra unit. They are also available individually if needed. Ask me how I know all of this.

Back to the mystery button, it is not an original part of the cruise control.

Cheers, Dan
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Old 01-16-2011, 11:38 PM   #38
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Ha! Cracking me up...

So if the Dana unit is way obsolete, and clearly missing the control switch or stalk at a minimum, then is it worth fixing? And if not, is there any harm in pulling it out? I'm trying to clean up a wiring disasterdash and, in the spirit of 'less is more,' would love to remove anything that's unnecessary and cluttering.

Thanks for the help, guys!

/d
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Old 01-17-2011, 01:29 AM   #39
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Ha! Cracking me up...

So if the Dana unit is way obsolete, and clearly missing the control switch or stalk at a minimum, then is it worth fixing? And if not, is there any harm in pulling it out? I'm trying to clean up a wiring disasterdash and, in the spirit of 'less is more,' would love to remove anything that's unnecessary and cluttering.

Thanks for the help, guys!

/d
The switch is available. The big item is the vacuum servo on the engine. There is a circuit board in it and if it fails toss the control box too because in the new units the servo and control are together in a single box. Actually when you buy the new unit you get the combo servo/control and buy the switch and speed pulse generator separately. In the new system the only thing under the dash is the wiring loom, the control/servo mounts in the engine room.

Cheers, Dan
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Old 01-17-2011, 06:35 AM   #40
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IMHO, the best solution to the behind-dash wiring nightmare is to either park it(not an option), or ignore it till something relevant quits...not savory, but our current option...m
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Old 03-15-2011, 09:48 AM   #41
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Quote:
Originally Posted by dalefox View Post
No switch on any of the stalks. See attached high rez pic...
Wow - your dash is totally different from mine.
I have the little button too - RIGHT next to the ignition switch - but my ignition switch/mystery button is on the opposite side of the column. Thankfully, judging from the pic, mine DOES have the Cruise (see the stalk - slide barely visible).

Now - mine comes with ALL the manuals (for appliances too) - so I'll have to go over and peruse through the manuals one day soon if the mystery hasn't been solved later in this thread before I get that far.
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Old 03-15-2011, 12:27 PM   #42
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OK - so - if that little black switch is for the Dana Cruise Control - and I have the CC on the stalk... then - what's MY little matching black button for???

Don't everyone be pushing my buttons at the same time!
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