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Old 01-01-2016, 07:16 PM   #1
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Battery Boost FAIL

Parked my 2014 Legacy 340KP the 28th of Nov. Went to pick it up for a trip to the shop (warranty work - slide plates and other) the 15th of Dec. and the chassis batteries were dead. Nothing! No instruments or ignition power. House lights were on. I started the gen and let it run for a few minutes (13v on the meter). Pressed the boost start button until it "lit up". The light in the button stays dim until there's enough juice in the start system, then it goes bright. Keeping the boost switch down I turned the ignition on and waited for the "wait" to go out. Turned the key to start - and it killed everything. Chassis power, house power, and gen. Everything. Freightliner 24/7 said it was a FR issue. Called CoachNet and talked with a FR tech (great guy) and did some troubleshooting. Found the 150A 32V mounted blown fuse in the house bay. The first fuse on the house side (not battery side) of the shut-off switch. Sent a note to Mitch at FR. He responded stating it's a known issue and there's a retrofit kit that does some rewiring and adds some additional fuses in parallel to handle the load demanded. He's sending it to my local shop.
Anyone else have this issue? Are there any other retrofit kits anyone has been sent? I find it unacceptable FR isn't notifying all owners anytime there is a need for a retrofit kit.
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Old 01-01-2016, 11:54 PM   #2
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Thanks for posting, had not heard of this issue..
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Old 03-26-2016, 09:28 AM   #3
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Any more info available on this? I had some work done on my unit last fall; when I picked it up I noticed that fuse had been replaced. No real explanation other than it blew.


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Old 03-26-2016, 08:07 PM   #4
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The story I got was when the coach batteries are REALLY dead, even using the boost to jump them, when you try to start the rig the amperage draw is still too big for the fuses to handle. You end up with the fuse after the shutoff and the one at the battery terminal being blown. The retrofit kit adds a fuse in parallel to the one blown and does some rewiring. Here's the drawing. I haven't tried it (no need) since the fix. Sounds to me like your shop killed the coach batteries and tried to use the boost - with the same results I had.
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Old 03-26-2016, 10:04 PM   #5
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I have the same issue. Thanks for the info on the retrofit
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Old 03-28-2016, 01:11 PM   #6
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drawing

Quote:
Originally Posted by dmwoody View Post
The story I got was when the coach batteries are REALLY dead, even using the boost to jump them, when you try to start the rig the amperage draw is still too big for the fuses to handle. You end up with the fuse after the shutoff and the one at the battery terminal being blown. The retrofit kit adds a fuse in parallel to the one blown and does some rewiring. Here's the drawing. I haven't tried it (no need) since the fix. Sounds to me like your shop killed the coach batteries and tried to use the boost - with the same results I had.
can someone send this to me as an attachement so I can blow it up and still read it...eyes suck
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Old 03-28-2016, 03:52 PM   #7
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Here's the PDF of it. Dan
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File Type: pdf Legacy Buss Fuse Upgrade.pdf (693.0 KB, 45 views)
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Old 03-28-2016, 04:34 PM   #8
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Thanks! I was having trouble reading it too. Will be getting my unit out of storage this weekend so I can compare it to the drawing.


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Old 03-28-2016, 07:31 PM   #9
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I didn't compare this new drawing to the one that's on the inside of the battery bay door to determine the delta. Nor did I check to see if the drawing matches the actual wiring.
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Old 04-02-2016, 03:44 PM   #10
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Got our 2015 Legacy RB out of storage today. Was very happy when it started without any problem. It does have the modified electric in the house battery bay, although the diagram on the coach bay door does not match it.


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