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

btw. this would only work if you have a relay that is wired to get signal from an in-cab switch and from the reverse circuit. otherwise the stock reverse harness could be powering all four lights which is obviously bad.

An isolated circuit with in-cab switch is definitely the best choice. I just remembered that you have to pass through R each time you go from D to P. If you shift too slowly the reverse lights will come on which would be a disaster if you got pulled over for, say, a dead tail light

Instant a$$ kicking.

 

This thread is amazing! I was looking for some info on the RFRM and building one up, hoping I'd find a couple of pictures and a few words, then I found this. Now I need a bigger budget. Thanks guys!

 

This is how I wired my rear lights:


The connectors I used to split the wiring were Multiple Sealed Wire Connector One 14-16GA to Two 14-16GA that I purchased at Waytek Wire.



My build page shows the installation.

 

So i don't know where i screwed up, but my accessories are not getting any power when i connect them through my relays. When i throw some lights on a stand alone fuse, it powers up though. My switches have LED power and ground, so they light up, dim, and the second light even comes on when i toggle them. First time really doing any kind of electrical on the vehicle and i am at a loss here.

 

Did you put fuses in the correct relay banks?

 

As far as i know. Relay 1 corresponds with fuse 1 and then the next one is Relay 2 w/ fuse 3

 

Snap a photo of your wired box.

Double check that you are using the correct relays. It's easy to wire up the wrong ones

 

I hope I got the right ones lol. I would also be relieved if it was something that simple

 

How about a backside photo, please.

The only other thing I would check is if you simply connected the wrong relay connector. If you wired it just like the DIY, you may be using a different fused bank.

The front looks correct, but the wiring is simple on this side!

The 30A fuse is a bit much for most accessories (that's the max the relay can handle). I use 5A and 10A for most of my accessories, but that's another story.

 

Ya, I had a 15A in there earlier. I just put the 30 in for reference

My first plug is ugly because I had to terminate it again and I ran out of plugs. I plan on doing it over later. I've tried plugging the lights into the other relays too and it's the same result

 

I don't believe both of your busbars are grounded. You are missing your "jumper" wire from one to the other.

Let me dig up a photo.

 

Essentially, I believe your relay side of your Bussmann was not grounded. Should be a straight forward fix!

Let me know how it goes. Good luck!

 

Sorry, I took it off to show the wiring better. When I hook the box up to the vehicle I have it installed.

 

I can tell right away, that none of your red Power Wires to your Accessories appear to be fully connected, try pushing them in a little further, they should look a little more like this. You won't be getting the added benefit of the Bussman being waterproof if their not.

 

So i think i might have found the potential issue. When i was flipping the switches on and off to see if the lights would turn on when connected, I noticed the upper LED was not lighting up. So i think i need to take another look at the tap-a-fuse and to make sure i'm plugged into a slot that provides ignition on power. Gonna check it out after i put the offspring down for the night.

The way i wired the relays and fuses is just like how the DIY says and the relays correspond with odd numbered fuses.

 

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good learning thread ...
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Figured out the issue. The power terminal was loose in the connector housing on the back of the switches. Thanks guys

 

Glad it was a simple fix! Sorry I just saw your other responses.

 

Yep, you guys definitely got the hamster wheel turning and had me checking some stuff that I hadn't previously