Breakaway power

[Jeffp60]

2018 octane (second owner), where is the power connected? Battery direct ? Power panel/fuse panel ? Trying to figure out wires in battery compartment.
Large red/white, 1 red Connected to fuse then to battery.
1 red connected to fuse then battery I disconnected that one,it sent power to side solar plug.

[Grumpy]

If you're talking about the break-a-way switch, it goes directly to the battery and it is not fused. Wire color is usually black.

[Jeffp60]

Only a ground ? Has to be power somewhere.

[Grumpy]

Originally Posted by Jeffp60

Only a ground ? Has to be power somewhere.

There is no ground on the break-a-way switch. That is the hot side. Hot in, hot out to the brakes.

[norty1]

The brakes are the ground!

[Jagiven]

The single wire from the breakaway switch goes to the positive battery terminal, no fuse. The ground for that circuit uses the common chassis ground.

[Jeffp60]

Well then it's smoked, all black wires to battery are ground.
So it must be wired to something in the harness.

[Grumpy]

Originally Posted by Jeffp60

Well then it's smoked, all black wires to battery are ground.
So it must be wired to something in the harness.

Only other place would be in the junction box where the harness connects to the FW. Do your brakes click when you pull the pin?

[Jeffp60]

They work. I'm trying to identify wires. Pd 4045 manual shows one wire to battery/fuse, and another shows wire PLUS FURNACE wire to battery. Nothing shows wiring for breakaway. And fuse panel doesn't show breakaway.

[Grumpy]

Originally Posted by Jeffp60

.Pd 4045 manual shows one wire to battery/fuse, and another shows wire PLUS FURNACE wire to battery. Nothing shows wiring for breakaway. And fuse panel doesn't show breakaway.

Because the break-a-way does not go through the fuse panel. It is either connected directly to the battery or in the junction box for the truck pigtail. It has no fuse.

[Jeffp60]

Originally Posted by norty1

The brakes are the ground!

I would think so,dc black is ground,ac black is "hot". "Usually" !

[Jeffp60]

Originally Posted by Grumpy

Because the break-a-way does not go through the fuse panel. It is either connected directly to the battery or in the junction box for the truck pigtail. It has no fuse.

Wouldn't think truck, no good if it breaks away. What a birds estimate the wiring is. Side solar plug ; looks like 16,18ga wire into 8ga battery cable! I guess it's for 10ft voltage drop ?

[Grumpy]

Originally Posted by Jeffp60

I would think so,dc black is ground,ac black is "hot". "Usually" !

Wires on the axle for the brakes will either be red or blue. Any black wire connected to the battery for ground would have a white piece of tape near the eyelet.

[Grumpy]

Originally Posted by Jeffp60

Wouldn't think truck, no good if it breaks away. What a birds estimate the wiring is. Side solar plug ; looks like 16,18ga wire into 8ga battery cable! I guess it's for 10ft voltage drop ?

Not the truck, but where the pigtail from the truck connects to the trailer. There is usually a metal junction box where the pig tail connects to the trailer wiring including the charging wire that goes directly to the battery.

[Jeffp60]

I'm going to disconnect and see what goes dead I guess. Red/white 4/6 ga is power box I'm guessing. Other 6/8 SHOULD be furnace but, I thought panel says furnace....

[Jeffp60]

Oh. Yea residential utility box on rear of a frame.

[Kije]

1 of 2 schematics I received from Jayco support, both show the same thing as I see it.

There are 3 "fuse" symbols shown on the schematics. On my 2017 28RLS, I have one inline 30 amp fuse, two circuit breakers, one 50 amp, one 20 amp. The 30 amp is power to the tongue jack; the 50 is fed by a 6 ga red wire leading into the camper and the converter.

As I read the schematic, the 20 amp breaker is in the line supplying power to the break-away switch. My understanding is these 12 volt circuit breakers are "auto reset" type, and will overheat under excess current flow, then reset as they cool. Is the break-away correctly wired this way as opposed direct to battery 12 volt?

[Jagiven]

Originally Posted by Kije

1 of 2 schematics I received from Jayco support, both show the same thing as I see it.

There are 3 "fuse" symbols shown on the schematics. On my 2017 28RLS, I have one inline 30 amp fuse, two circuit breakers, one 50 amp, one 20 amp. The 30 amp is power to the tongue jack; the 50 is fed by a 6 ga red wire leading into the camper and the converter.

As I read the schematic, the 20 amp breaker is in the line supplying power to the break-away switch. My understanding is these 12 volt circuit breakers are "auto reset" type, and will overheat under excess current flow, then reset as they cool. Is the break-away correctly wired this way as opposed direct to battery 12 volt?

1st time I have seen any documentation that says an inline fuse is required.

I understand the safety issue of an unprotected wire. But you do not want to loose power to the brakes in emergency situation.

Personally I would find out what brake system you have. Then contact the manufacturer and inquire with them. If you do, please let us know what they say.

I feel like some young designer, was just following the guide book that says every branch line needs a fuse. The design, slipped through the review process and made it to production.

[Kije]

A check on the Lippert site (I have Lippert axles/brakes) in response to a breakaway switch issue states

"verify there is no fuse located in that circuit. There could be an auto-reset circuit breaker, but never a fuse."

This would be consistent with the Jayco schematic I posted, at least for my 28RLS, which has one 30 amp FUSE (for the nose wheel jack", one 50 amp CIRCUIT BREAKER
for the 12 volt lead into the camper, and one 20 amp CIRCUIT BREAKER which "could" be used for the breakaway power. I say "could" as mine is wired direct, 14 Ga orange (faded to yellowish orange) wire from battery positive to one side of BA switch, 14 Ga black wire from opposite side of BA to junction box where it ties in to the blue wire from the tow vehicle cable and the blue wire leading to the rear toward the brakes.

The 20 amp circuit breaker in my case was only used for the two pin SAE connector for the "Solar Ready" circuit and then to power.

[Jeffp60]

Kije, thanks for that. In the battery box I have two auto resets. One was powering the side solar plug.