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Old 04-27-2021, 01:01 PM   #1
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Please brake controller help

Good morning all.. Iíve looked all over. Read ton of post but still confused about a few things. Iím not very good with wiring but can try before calling uncle. Wonít to know how it works. I have an 06 Diplomat 38 pst. It is prewired and I think I found the plug under the dash. But I canít find the blue controller wire up front. In the back the blue wire gets separated from the rest of the loom.? Canít trace it down.. Any ideas.

Know I think I found the brake sig wire coming out of a relay in front run bay. Is this right. See pics. Click image for larger version

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Hope this worked.
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Old 04-27-2021, 01:15 PM   #2
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Ok. That worked 😳. The first pic is the relay second from the bottom. Second pic is the wire with brake sig written on it. Is that the right wire?

Hereís a pic of the plug up front. Click image for larger version

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Also I didnít see anywhere that said that the prewired plug is fused right?

I know this probably common for most but just want to make sure it right. I will be pulling a 28í enclosed trailer. 🤪

THANK YOU AND SAFE TRAVELS.
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Old 04-27-2021, 02:45 PM   #3
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rdvd-

Monaco Brake Controller Location Guide
Service Bulletin for Monaco Coaches

Matching connector available from Allied Electronics here. Pins listed at the bottom of that page. Can make the wiring from the controller to the coach (dash) connector "plug-and-play," meaning no cutting or splicing of the factory wiring or connector.

The attached drawing should answer your question about fuse(s). "BRAKE CONTROL INTERFACE," which is the coach dash connector for the trailer electric brake controller, appears in Zone G-15 on the drawing.
Attached Files
File Type: pdf dip_chassis_12v.pdf (1.10 MB, 22 views)
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Old 04-27-2021, 04:01 PM   #4
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Thanks you for your reply. The bulletin was very helpful. The drawings are hard for me to understand. But it looks like there is a 20 amp fuse on one of the wires but the writing is hard to read. And there a five wires?

The site with the plug will make it a nice and easy if I can figure out witch wire is witch. In the battery compartment there a plug with a 20 amp auto reset fuse that is wired to a relay. It says trailer charge. I believe is the black wire at the tow plug.?
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Old 04-28-2021, 09:48 AM   #5
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I would think "trailer charge" is constant 12v supply wire. It could be used to keep toad battery up, trailer house battery, charge a break away brakes battery or supply interior lights ect. to trailer.
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Old 04-28-2021, 06:43 PM   #6
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Quote:
Originally Posted by rdvd View Post
l1v3fr33ord1
Thanks you for your reply. The bulletin was very helpful. The drawings are hard for me to understand. But it looks like there is a 20 amp fuse on one of the wires but the writing is hard to read. And there a five wires?

The site with the plug will make it a nice and easy if I can figure out witch wire is witch. In the battery compartment there a plug with a 20 amp auto reset fuse that is wired to a relay. It says trailer charge. I believe is the black wire at the tow plug.?
Per the drawing:

Code:
Pin     Signal              Purpose
1       GROUND              Ground
2       BBUILD IGNITION 1   Illumination
3       TRLR BRAKE +12V     12V power to brake controller
4       TRLR BRAKE          Brake signal to controller
5       TO BRAKE CONTROL    Brake signal from controller to rear
The plug and "cap" connectors are polarized. There is a ridge on the number 1 pin position.

Also, the wires will be marked every foot or so with their function (that is, the "Signal" as above).

This should help you map which signal is where on that six-pin connector.
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Old 04-29-2021, 11:00 AM   #7
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Thank you !! My wires the writing at the plug is worm off and getting into the Amazon of wires 😳..
Iíll get on searching those down this weekend. I didnít think it would be that hard. Being prewired and all. Iíve been all over this coach looking. 🤯

Fed ex delivered my watts links kits. But only 4 of the 5 boxes. Canít tell me where the other box is. 😳.

Just finished with the trw steering box swap.

Once again THANK YOU.

Back to the real job. 🤪🤪
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Old 04-29-2021, 04:17 PM   #8
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In our 2005 ambassador I found the blue wire in the 7 pin trailer plug but could not find it under the dash it turned out there was only 3 feet of wire on that blue wire. So I had to run a new wire from back to front what a pain in the butt.
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Old 05-03-2021, 02:08 PM   #9
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Before I finish this topic I want to thank all those that responed especially l1v3fr33ord1 I will be saving those drawing. So here we going.

The plug 5 pin connector was not the brake controllers connector. Idk what that connector is for. So I ran a wire from the relay plug in the front run bay for the wire that said ď to brake controllerĒ wire #197. Tested it to the plug that I thought was the brake controller connector. No continuity to any pins on the connector..? Checked on my thinking?? Sounded good 😳. So I started looking around. Well in the front run bay there was this lone wire with a fuse. I followed out into the gen bay though the fire wall into driver area. It ran to a bundle of wires. There it was they had cut the plug off and taped up all the wires. Hidden up under the dash. All the wire are labeled. Now in my hunt to find this plug I discovered that someone wired a 6 round brake controller running all there own power, ground and brake wire with no fuses anywhere 😳🤯😳. Direct 12v off the connection in the front run bay. I took all that out before a FIRE !!! Thank god nothing happened. I have been at this for more than a few days but it all done. Time for a couple of beers.

Once again thanks for all the input ..
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