DIY - Build and install a Bussmann RTMR Fuse/Relay Block

I'm just heading out but the quick answer is you need to bring power to your relay coils (via switches) from a source that is only live when the truck is started. I believe there are IGN fuses behind the dash that meet that criteria.

- add a fuse from slot that is only hot when truck is started
- run that to your switches
- out from switches to relay coils
- main power running through relays from battery

 

I was having a similar conversation with Iggy on PM. This would only help for items that are relayed.

There is no switch for these items except on the items themselves. If the power is constant, they will stay on unless I turn each item off. For instance, if I have my seat warmers set on "3" on the dial, they would stay on at "3" (even if the truck is off) until the batteries are drained. Which can also be viewed as a safety hazard if the seat warmer wiring fails.

I am really just interested in shutting off the power to this positive terminal of the box completely unless the ignition is on. I am just having a hard time finding a cheaper solenoid solution that is on when low amps are applied and off when the low amps are removed. I'd rather not pay $160 for the ML-RBS but that is what it is made for. I think the SL-ACR is a decent solution but I don't know if it could handle the constant power or, if it is like the ML-ACR, it needs a jolt of power to open and a jolt of power to close.

 

Awesome Writeup! Thanks for putting in the time to share with us! Cant wait to start this project1

 

I installed a solenoid like what you are showing, except I got a marine one that is water proof. I then put a fuse tap on an accessory (key on -hot) into the fuse panel under the dash on the drivers side and ran that back to the solenoid. So I came off the battery with a battery cable to the solenoid and then to my Bussman panel. I can take some pictures and post them if you like... Sorry unless that is considered thread jacking, then pm your email and I will take the pics and send them with a better description.

 

Do you happen to know the model number of the solenoid that you used? I just placed an order for this solenoid but still am not convinced it is the more appropriate:

$25 NEW 12V 150A CONTINUOUS DUTY SOLENOID RELAY FOR GOLF CARTS 300A IN RUSH 1114208

http://www.amazon.com/dp/B008R1T5IM

I understand how it would all go together, just not sure which part is the most appropriate for the application.

I'm not the OP but it seems pretty relevant to the topic.

 

Here is the one I purchased
http://www.delcity.net/store/Soleno...sulated-Continuous-Weather-Resistant/p_743396

 

Wow!!! Incredible write-up. Thanks for the detail. It must have taken a long time to put this together.

-Doug

 

I haven't researched what specific part I would use to achieve what you're asking for, but a solenoid is what's needed. In this case, run a wire from your fuse panel ACC circuit(or similar) to switch the solenoid when the ignition is on. Then the Bussmann would receive power through the solenoid. You just have to make sure the solenoid is rated at 80 amps or higher.

 

No problem at all. I've said this previously...this is only one way to build and install one. There are various modifications and adjustments available. So I'm all for learning a different or more efficient way to do something. If you have something to add, them go for it!

 

Thanks for the response. I actually ordered this solenoid yesterday and should be here tomorrow. I found a member talking about it on the FJ forum I think.

PAC 200 Amp Battery Relay and Isolator, Amp Relay, 12 volt Battery Disconnect Relay, Water-Resistant and Extends Battery Life

http://www.amazon.com/gp/product/B000CEBXRS

 

This awesome

 

Love this write-up. This is going to help me tremendously. Much respect.

 

WOW! Informational treasure trove here... Very nicely done!
The parts and tools section alone is awesome! Then the tutorial to boot...

 

Remarkable effort. Incredible contribution. This is textbook material. I can't imagine the total time it took to put the tutorial together.

 

I've just ordered some of the parts to start on this...I was in NO WAY thinking there would be this level of detail in a diy thread. I'm not 100% sure I'll go to the intricate details with all the connectors you did but I'm a fair bit OCD myself so I'm probably gonna bring up the waytek website here again shortly This really is one of the best write ups I've ever seen....you win the Internetz

 

The way I built mine is only one way to do it. Of course, the decision to use connectors or not is personal as is the type of connector. So I'd like to think that mine is a very flexible install. If you're able to gather enough info from the tutorial to help you with your install, then I achieved my goal. Best of luck and feel free to share your install. I'd enjoy seeing pics.

 

subd! Thanks for all the info, definitely going to help me get the ball rolling for my next project.

 

all my parts have been ordered . The min quantity stuff included so I'll have some extra connectors and whatnot but that's cool. I love those connectors. Already have most of the crimp tools and cutters. I should be starting on mine next week

 

Awesome!!!

 

How much did everything cost you?