WME Posted May 4, 2015 Share Posted May 4, 2015 I hope I can get the pics right. A family we camp with has 5th wheel camper and this winter he boiled a set of batteries dry. He wanted to know what happened. I asked what converter his trailer has, Magnetek 6345. So I explained what happened and the fix was about $200 for the upgrade or new converter. "Ain't happen, I have to buy new batteries now, what choices do I have? Plan B install a deck mount converter in the Magnetek converter. From E-bay a 55 amp 3 stage PowerMax converter for $110. Here we go The villain of the story. 12v fuse board. Most of the big $$ conversion provide a new 12v board with all the circuits filtered because of budget constraints we will install a jumper to make all the fuses filtered. Remove something like this, the pwr supply for the converter. Red +, white -, blue unfiltered 12v. Remove the old guts More soon Quote Link to comment Share on other sites More sharing options...
WME Posted May 4, 2015 Author Share Posted May 4, 2015 I cut a slot in the back of the chassis so that the rear side tabs will slid in. OR cut the tabs off or bend them over. Bolt the new converter in the old chassis. Red +, white - , bare wire ground...cut off 3 prong AC connector. Install the lid. Route the wires through the holes. Cut drill a bunch of vent holes in the side of the chassis for the cooling fan in the new converter. PS the lid is on upside down OOPS. Connect +,- to rear of 12v fuse board. The blue wire is the jumper to bring the 12v filtered power to all the fuses. Blue wire jumper good idea, blue wire in back of board BAD idea. To many sparky things to make connect with. See final install. Installed and hooked up, blue wire correctly hooked up. All is good. Batteries very happy. Cost 3 hr and $110 That's all Quote Link to comment Share on other sites More sharing options...
Ctgriffi Posted September 8, 2016 Share Posted September 8, 2016 I'm in the middle of almost exactly this same scenario right now, so I was excited to find the write-up and the photos. But... I could still use a little more detail, if possible. Could someone fill in the blanks below explaining the exact connections to the PowerMax, please? Much appreciated. My Magnatek has three large gauge wires coming down to the converter/charger on the right-hand side: red, blue, and white. On the left-hand side, there are two smaller gauge wires: black and white. Large red wire connects to: ________ Large blue wire connects to: ________ Large white wire connects to: ________ Small black wire connects to: ________ Small white wire connects to: ________ Quote Link to comment Share on other sites More sharing options...
Ctgriffi Posted September 8, 2016 Share Posted September 8, 2016 Well, so I did a bit of research. Here's what I found (feel free to correct/expand)... Large red wire connects to: + lug on converter Large blue wire connects to: + lug on converter Large white wire connects to: - lug on converter Small black wire connects to: + wire on converter AC plug Small white wire connects to: - wire on converter AC plug So, the large blue and red wires both carry 12V+. In the original system, one was "filtered" voltage, one was not. In the PowerMax, I think, all voltage supplied through the positive lug is filtered, so the red and blue wires can be jumpered together—that way, all circuits get filtered voltage. (Does this sound correct?) Quote Link to comment Share on other sites More sharing options...
WME Posted September 8, 2016 Author Share Posted September 8, 2016 I barely remember, BBBut. I think RED + White - Blue is unfiltered + not used Black and White are the AC input Quote Link to comment Share on other sites More sharing options...
WME Posted September 8, 2016 Author Share Posted September 8, 2016 Sounds good, see pics 3,4 in the second post Quote Link to comment Share on other sites More sharing options...
Ctgriffi Posted September 9, 2016 Share Posted September 9, 2016 23 hours ago, WME said: Sounds good, see pics 3,4 in the second post Cool, think I've got it all squared away, and it seems to be working great. Appreciate the help. Btw,I ended up ditching the lower case completely because everything was riveted in there, and I don't have time for that! Quote Link to comment Share on other sites More sharing options...
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