Originally Posted by BerylCop
To prevent my battery in my 2011 Honda CRV from losing its charge while towing, I purchased a Fuse Master flip switch from Roadmaster that eliminates the necessity to pull the 7.5 amp micro fuse each time before towing. An instructional video makes the installation appear easy. I am having real trouble inserting the flat pins into the radio fuse slot position in the fuse box under the dash. (This is not shown in the video). In fact I broke both pins trying to insert in the micro fuse slot. Have replaced both flat crimped pins but still cannot seat them properly. Spoke to Roadmaster tech and all he said was "yes, they are very difficult to install, had problems myself"! The fuse switch is "pricey" ($60.00 +) but if cannot resolve this would be willing to find another solution to the discharge battery problem while towing. Any suggestions.
The answer to this has been discussed on here a few zillion times but, that's ok. We towed an '11 CRV for about a year and a half before changing toads. Pulling that number 34 fuse, even one time for me was a serious pain in the a$$. So, I did what many other guys have done and that is, setup a "Charge line".
A charge line is nothing but a 12VDC wire, that runs from the coach trailer plug, through the pig tail, and up to the positive post on the Hondas battery. You can install a fuse in the line if you wish and, it's most of the time, recommended. The wire should be in the neighborhood of at least 12GA. There's no real load on it other than, keeping the Hondas battery at a constant charge because of the drain that's on it because of the key in the certain position for you to tow it.
The cost of such a charge line is considerably cheaper than you paying $60 for your remedy. I did ours for about $5.00. You don't have to go one of those "brand name" items that's labeled for such an operation. The plug or, I should say, 12VDC on the coach end should be, for all practical purposes, ignition hot. That is, it should not go hot until the coaches ignition is turned on. If it's hot without the ignition, that will work too.
But, we towed that '11 CRV all over the western U.S. and sometimes, for well over 8 hours and never, repeat NEVER had a dead battery when it came time for disconnect. It's an incredibly simple system to setup. Just some info for ya here.