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

The minimum order quantity for many of the items on the parts list is above and beyond (especially the wire), so I imagine there might be someone here that has done this project and is sitting on a bunch of extra parts. Perhaps you would like to recover some of the cost and sell me some of it?

 

https://www.tacomaworld.com/threads/bussmann-rtmr-fuse-relay.637143/#post-23466306

 

Hey fellas, I’m the middle of my build and managed to goof up one of my connectors on the Bussmann. In mucking with it, I pulled the wire loose and of course the pin stayed in the Bussmann. What tool do I need to get that puppy out?

Thanks!

 

Check out this video to see if it will help you.

 

Appreciate that. I have some tiny screwdrivers and will try and give that a try. Last night didn’t work, but I wasn’t so aggressive with the torque.

 

I have found gentle prying most effective. Just keep moving the pick around while gently pulling on the wire on the backside. Also, take a look at one of the pins that is identical but not inserted yet to see Where you need to pry and what you need for a motion to release it.

 

. Wire’s already out. That’s the big issue. I noticed after I’d added my 4th accessories harness that I’d forgotten to put the little blue keeper on it. With a well applied shrink tube, it wasn’t going to go in so I was going to have to disassemble it to redo the tube and keeper. That’s when the wire tugged free.

Add: the pin isn’t out.

 

Use one screwdriver or thin probe to release and a second to push the terminal out. Done correctly it shouldn’t take much force at all so be careful and patient.

 

Finally hit the magic rain dance and the scrub i had left in there popped free.

Progress, a little peeved about making the first one a little too short but decided not to redo it.

 

Never done any wiring at all before. But I just ordered everything to build one. How would I wire the Cali raised LED switches? Also looking for a plate to mount everything to. I have a 2013 2.7 MT access cab 4x4 if that helps

 

Welcome.


Read, or re-read @tacozord ’s first few posts in this thread esp this one on installation:
https://www.tacomaworld.com/threads...n-rtmr-fuse-relay-block.399454/#post-11086094

EVERYTHING you need to know is included.

If you’ve never done any wiring before and have to ask how would you wire the LEDs, you might not have the requisite knowledge to do a safe build and install of the bussmann. You might want to reconsider and buy a pre-assemble one then have someone install it for you. This can be dangerous. Trucks do burn...

As to where to get the mounting plate, that too is covered in the lessons at the beginning of this thread.

Good Luck. Be Safe.

 

I likely don't have all the knowledge to do the install. But I'm trying to learn it. I'll have to reread his original post a few more times for sure though! My confusion is the switches I was looking at using only have 4 connections instead of 5. So I don't believe they dim. Just on or off with the dash lights or when toggled depending on how I wire them. The description on the Cali Raised LED site isn't that great so I'm just trying to see if these switches will work for me the way I want them to. And the mounting plate options seem to be all for automatics is why I asked. A member was making them and did a group buy but that's no longer available. I was just wondering if anyone else had any suggestions to save me from searching haha. But I will continue the search. I appreciate the response though and thank you for your help.

 

They do dim. Cali-raised uses the same switches found all over the net. They have 5-pin connectors but only 4 wires are used(Unless you have the double switches). Two are for the switch function and the other two are power/ground for the independent led. The switch dependent led get power from the switch and shares ground with the independent led. Dimming is done on the ground side so it doesn’t affect switch function. Because of this dimmer ground is not th same as chassis ground.

 

1st, thank you OP. There was a ton of time and effort that was put into this post and it has helped a lot of people understand a bit more about auto electrical. Thanks.

Final finished be install today. I wanted an OEM type look - meaning if someone other than a Tacoma World member looked under the hood, high probability they won't notice the install.

Designed a bracket and had a 3rd party cut/bend it. Made a 'through hole' midi fuse holder, by mounting two Littlefuse midi fuse holders (midi 498) on either side of the panel. I found some nylon washers at Home Depot I used to isolated the threaded rod than passes through the bracket. The 80A midi fuse can be accessed top side, but the wires are hidden bottom side. Here are some pics:

 

NICELY DONE!

it does look very OEMish.

 

So since they share a ground, would I just not use the independent LED ground wire in the wiring harness that connects to the bussmann? Like I could just use the ground that connects to the external buss bar? I'm sorry this is so basic. I'm just trying to understand how to do a clean install.

 

It takes awhile for all the details to become clear but once they do you’ll see that each individual part is simple, only the sum of all of the simple things makes it complicated.
The ground wire from the the switch is only for the two leds. Connect it to dash dimmer ground if you want dimming or connect to any chassis ground including the one the Bussman is connected to for no dimming. Connect the switch power wire to a fused source and connect the led power wire to dash lights power(on with headlights only) or another 12v source including your switch power if you want them on with the switches. Keep in mind though, if you need any of your switches hot with ignition off that last one will be a parasitic drain on the battery. I do dash power and ground to make them all behave as stock switches, i.e. on with headlights and dim with the rest of the dash.

 

Very nice!

 

I have found a few places that you can buy kind of just what you need. I throw in the caveat that I have assembled the parts but have yet to build or screw anything up. I did add an error factor when ordering.
https://ceautoelectricsupply.com
https://www.customconnectorkits.com
https://www.electricalhub.com
The tray and switches are what they are. I did have the 4awg wires/parts professionally crimped. Also note mounting locations can differ and that the OP is a great photographer because this stuff is small. Fat fingers beware lol.

 

Thanks dude!