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Old 04-13-2012, 04:55 PM   #15
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Good news and bad news!

The good news is that the furnace works! The bad news is that the wire from the overhead light to the panel is bad.

I used the Ohm function on my multimeter to check the wires. I had connection from the light to the 12v outlet on the other side of the coach.

I also bought a 15ft section of wire for testing. I was able to run the furnace from both the 12v outlet and the light wire. My issue is clearly between the light fixture and the 12v panel.

The purple wire goes onto the ceiling. How in the heck am I supposed to replace a wire that goes into the ceiling and comes out below the dinette?

Oh, please ignore those curtains. JPA Drapes is making a new set while you read this!
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Old 04-13-2012, 05:13 PM   #16
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Quote:
Originally Posted by 1985air345
The good news is that the furnace works! The bad news is that the wire from the overhead light to the panel is bad.

I used the Ohm function on my multimeter to check the wires. I had connection from the light to the 12v outlet on the other side of the coach.

I also bought a 15ft section of wire for testing. I was able to run the furnace from both the 12v outlet and the light wire. My issue is clearly between the light fixture and the 12v panel.

The purple wire goes onto the ceiling. How in the heck am I supposed to replace a wire that goes into the ceiling and comes out below the dinette?

Oh, please ignore those curtains. JPA Drapes is making a new set while you read this!
I had JPA Drapes make me a new set for my 280 a couple yrs ago. They are beautiful and I'm extremely happy with them!
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Old 04-14-2012, 05:53 AM   #17
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Don't get sidetracked by the curtains! . Do I have to start pulling panels to follow that wire and/ or rewire? My hunch is that a connection is loose in the wall.

I'm pretty sure the answer is yes but I guess I need confirmation!
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Old 04-14-2012, 08:39 AM   #18
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Where did the purple wire that is hanging down from the light fixture connect? I see it has a spade lug.
Also , in the first pic it looks like there is damage to the purple wire about 6" back from the spade lug. Looks like it was pinched or something. Is it the same purple wire in both pics?
I only see 1 purple wire in each picture. Are they the same wire? Can't see the spade lug in the second picture clear enough to tell if it is male or female. The first pic shows it clearly being female.
I would expect to see a second wire. Are you sure it hasn't just become disconnected from the wire that goes to the fuse panel.
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Old 04-14-2012, 09:29 AM   #19
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The damage to the wire is from the splice that goes to the other reading light. I did check the power from that spot also. The female end plugs into the male part of the switch.

There is a lavender wire and a darker purple wire. It is the darker one that is in question.
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Old 04-14-2012, 02:35 PM   #20
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I am confused. Which is easy to do.
I only see 1 purple wire hanging out of the hole where the light goes. You mentioned that when you connect power to that wire you have power to the furnace. Is that correct?
Is the wire at the fuse box purple or lavender? I don't see a lavender wire.
What are the two switches for?
The wires look in good shape. In looking at the fuse panel it appears that the purple wire goes into a sheathed cable along with other wires. Is this correct. Where is the furnace located relative to the light. Are you sure the purple wire doesn't go to the furnace first then to the outlet and light. When you connect the power to the purple wire at the light you could be feeding back to the furnace and outlet.
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Old 04-14-2012, 04:58 PM   #21
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You mentioned that when you connect power to that wire you have power to the furnace. Is that correct?
Yes, and the 12v outlet.

Is the wire at the fuse box purple or lavender? I don't see a lavender wire.
Purple (the lavender wire comes out of the ceiling to the center part of the light fixture from the wal switch. Those lights work.)

What are the two switches for?
They are for the reading lights at either end of the light fixture.

The wires look in good shape. In looking at the fuse panel it appears that the purple wire goes into a sheathed cable along with other wires. Is this correct.
Correct.

Where is the furnace located relative to the light?
The furnace is toward the rear of the coach (road side), the 12v outlet is mid-coach on the road side).

Are you sure the purple wire doesn't go to the furnace first then to the outlet and light. When you connect the power to the purple wire at the light you could be feeding back to the furnace and outlet.
That is a possibility I have not thought of. I know that I do not have continuity from the 12v panel the 12v outlet or the light fixture. The wiring between the 3 items is good. I just need to figure out which one gets fed first from the 12v panel.
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Old 04-15-2012, 10:15 AM   #22
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Known:
  • Issue is isolated the purple circuit.
  • The blown fuse the PO encountered is likely a loose connection or short.
  • I have continuity between the three items (furnace, 12v outlet, light) on the circuit.
  • All three operate with separate 12v line run.
  • There is no continuity to the purple wire in the 12v panel.
  • I have no way of knowing the route of the purple wire.
Mission:
  • Follow the purple wire starting at the 12v panel to find the short, bad wire, bad connection.
Question:
Was it common for Airstream to split the circuit inside the walls? What do those connections look like?
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Old 04-15-2012, 01:58 PM   #23
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Can't answer the question about inside wall connections. But A$ does make connections inside the wall for devices like the running lights.
Can you look where the furnace connection is made to see if there are 2 purple wires? Perhaps one has come lose.
If not there, is there a possibility that some other 12 volt device has the purple wire you are looking for. Wherever the purple wire runs there will be 2 wires, one coming in and one going out to the next device in the circuit. The only places you will find one wire is at the fuse panel and at the last device in the circuit.
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Old 04-20-2012, 09:15 AM   #24
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Have you made any progress on the purple wire problem?
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Old 04-23-2012, 09:45 PM   #25
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Just a little progress on the wiring. I am heading out on Thursday to Florida so I won't need the furnace there! I did run a separate 12v wire over to the 12v outlet and all three items are working. The furnace actually fires up nicely! I will still need to trace that wire this summer to find the short/open circuit.

I have installed my new curtains, changed spark plugs, filters, etc. I also had to fabricate a new shower curtain including cutting it and installing the snaps. I received the LED light bulbs. They work great for the outside lights that tend to get very hot. They are not so great for the inside. The bright white light is more like an office than a warm home. I also set up my trailer hitch bike rack. I ordered the wrong hitch extension from Amazon and I had to run to U-Haul to get the correct one!

I also had to fix a water leak from the air conditioner. The PO had it installed and it was done incorrectly.
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Old 10-10-2012, 09:25 AM   #26
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...Was it common for Airstream to split the circuit inside the walls? What do those connections look like?
Fred, I can answer this question. Yes Airstream did split circuits inside the walls. When I dismantled the 345 there were probably dozens of wires splitting off and running in different directions. I will say however the all of those connections seemed to be well made and insulated. Based on what I observed I would be very surprised if any connection spliced inside the walls could fail.

I'm not a fan of splicing wires like that and then burying them inside a wall or ceiling but the quality of the splice tells me they are probably secure and safe.

Did you ever get your purple wire issue resolved?

Brad
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Old 10-10-2012, 10:07 AM   #27
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I resolved it with a work-around! I ran another wire back behind the sofa and up through the wall to the 12v outlet. I used some plastic cable track from Lowe's to make it look better and protect the wire. The walls are too hard to disassemble to access the wiring.
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Old 10-10-2012, 12:59 PM   #28
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I resolved it with a work-around! I ran another wire back behind the sofa and up through the wall to the 12v outlet. I used some plastic cable track from Lowe's to make it look better and protect the wire. The walls are too hard to disassemble to access the wiring.
Trying to get access behind the walls or ceilings is not for the faint of heart. I learned a lot while dismantling that 345 and I hope to heck I never have to get inside those spaces to fix something.

Based on what I saw in the 345 I would be surprised if there is an actual physical problem with a wire inside the wall. The exception to that would be if someone drilled a hole, installed a rivet or screw or using some other means penetrated the inner (or outer) skin and damaged a wire.

The problem is most likely going to be near a connection point. When you finally get your factory service manual hopefully you'll be able to see the routing of that purple wire.

If I remember right Keyair (Steve) bought something that generates a signal on wire that allows you to trace it's route. That might be one approach to finding where it goes.

Brad
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