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Old 06-16-2016, 08:55 AM   #1
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RobRoy's Avatar
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Posts: 1,656
Trailer Brake Controller Wiring & Racor Fuel prime

2004 HR Navigator 500ISM

Is there a trailer brake controller wiring harness installed from he factory?

also my Racor Fuel prime & water drain is in-op or so it appears so.

I checked the wiring to and seems to be no 12vdc power to it. When should it have power ?

Key on engine off?

Key on?

any idea where to look for a fuse?

Thanks in advance
2004 HR Navagator 500 ISM
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Old 06-17-2016, 07:53 AM   #2
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Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 826
Thumbs up Racor 700

On my maiden voyage with my 04 Sig the fuel priming pump/ primary filter went bad and allowed air to be sucked in to the fuel system and I coasted to a stop on the edge of Interstate 25 south of Denver. (Another story) When back home I replaced it with a new Racor unit. Those original units were known to fail as mine did. The new unit is awesome and I install filters dry and the pump fills them with fuel, both one at a time. It was plug and play for the replacement unit. They can be bought from Parker Hose Stores all over the country with filters available there too......

2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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Old 06-17-2016, 09:09 AM   #3
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Posts: 876
Trailer Brake Controller Wiring & Racor Fuel prime

I recently replaced the original Winn unit with the Racor unit on my 1994 Signature as my priming pump had stopped working.

I also installed 1/4 turn cutoff valves on the input and output of the filter to contain the diesel fuel better during filter changes.

I like the new Racor unit a lot and installed the primary filter dry and used the priming pump to fill it. I still have to change the secondary filter.

Paul Whittle
2005 Monaco Signature 45'
525 HP/1850 Ft Lb ISX-15/6-Speed Allison 4000
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Old 06-17-2016, 09:26 AM   #4
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Here is a link to Unified Tow Brake Controller wiring on Monaco coaches until 2006, it does not show the HR Navigator as being prewired but you may check to see if there are pig tails similar to the pictures.

Brake Controller Location Guide for Monaco Brand Motor Homes - Unified Tow Brake
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 06-17-2016, 01:18 PM   #5
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Location: Lake Havasu City, AZ
Posts: 1,384
Look over your 12v fuses and look for anything to do with Trailer brakes. Mine shows a fuse for "AUX BRAKE CONTRLR" and it was pre-wired. If none, it probably isn't pre-wired.
2012 Monaco Knight 36 PFT
2019 Jeep Grand Cherokee Overland
2005 Jeep Rubicon Unlimited on 2007 16' Car Hauler trailer.
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Old 06-18-2016, 12:49 PM   #6
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I just took a look both under my dash and in the fuse box for any signs of trailer brake wiring. I couldn't find any and I think my coach is somewhat similar to yours.
Gwen & Curtis Nikel
2009 CC Affinity
2015 Dodge RAM Ecodiesel 1500 Toad
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brake, fuel, wiring

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