Ursa Minor Pop-Top Jeep JK

Presto88

Adventurer
I need some advice.

I bought my J30 almost 4 years ago. When we were installing it, I was kind of in a hurry so I didn't bother hooking up the electrical connection - I just left the wires hanging in the passenger side B-pillar. Now here I am almost 4 years later with 50 nights or so spent in the thing without being able to use the lights or the charging ports up in the tent. Yesterday I decided it was time, so I fished out the wires and connected them up to the battery. But nothing works. There appears to be a small light on the switch located in the middle of the roof (above the windshield), but the light doesn't come on when I flip the switch.

I can trace the wires up the B-pillar and into the J30, they slide into a sleeve built into the canvas side of the tent, but I lose them after that. I'd like to test the wires at that switch above the windshield, but don't really see an easy way to access them. Any suggestions that people have would be welcomed. Thanks!
 

Presto88

Adventurer
Did you check the wire running to the battery? When I have had a problem that has usually been the issue.
Yes, both of the wires from the top (positive and ground) are running directly to the battery. Well, I have an inline fuse on the positive, but the fuse isn't blown. I'm VERY confident that power is making its way up to the J30, but it doesn't seem to be making it all of the way to that switch. I'm assuming that everything runs through the switch, right? I mean, if things were running correctly then turning off that switch would kill all the lights and outlets in the entire J30 top, correct?

So what I'm really asking about is does anyone know the easiest way to get to the wiring behind that switch?
 

JDaPP

Adventurer
That switch cuts all power to the very top. If you have lights or 12v in the lower part those should work without the switch (at least they do on mine).
That is weird that the negative runs to the battery, mine is grounded at the bottom of the b pillar.
 

JDaPP

Adventurer
Somebody posted the wiring instructions but I can't seem to find them so you might try searching for them or reaching out Ursa Minor. For what it's worth I have never found a way to access behind that switch.
This video may have something in it but it is mostly a installation video:
 
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Presto88

Adventurer
That switch cuts all power to the very top. If you have lights or 12v in the lower part those should work without the switch (at least they do on mine).
That is weird that the negative runs to the battery, mine is grounded at the bottom of the b pillar.
Yeah, mine was that way too. When I couldn't get things to work, my first attempt at fixing it was to solder an extension onto that ground wire and then run it out to the battery. Last summer when I was installing a CB antenna I had grounding issues, so that was the first thing that I suspected.
 

Presto88

Adventurer
I don't have lights or 12v in the lower part, so I can't test that.

I never hooked up the white wire because I didn't see the need for another brake light, but I'm pretty sure that isn't the problem.

Thanks for the advice and link to the video, JDaPP. I think I'll drop Ursa Minor a line next week to see if they have any suggestions or a wiring diagram or something. If not, well, then I'll just keep camping the way I've been doing it! The thing is, every time I'm up there and seeing those nice reading lamps I want to get this thing working!
 

JARunning

Member
I don't have lights or 12v in the lower part, so I can't test that.

I never hooked up the white wire because I didn't see the need for another brake light, but I'm pretty sure that isn't the problem.

Thanks for the advice and link to the video, JDaPP. I think I'll drop Ursa Minor a line next week to see if they have any suggestions or a wiring diagram or something. If not, well, then I'll just keep camping the way I've been doing it! The thing is, every time I'm up there and seeing those nice reading lamps I want to get this thing working!
This is the manual that came with mine if it helpsView attachment 06-01-17 J30 Installation Guide.pdf

Sent from my Pixel 4 using Tapatalk
 

Presto88

Adventurer
Hey, thanks for that JARunning. That version is much improved over the hard copy that came with my top! It doesn't really tell me anything I didn't already know regarding this problem I'm having, but I'm going to keep the pdf in my Jeep folder for future reference.
 

JARunning

Member
I am surprised this hasn’t been shared yet. The JL tops are finally in production!
That looks like perhaps a bit more clearance at the front, and molded in drip rails. sweet!

Also, shameless plug for the ad on my Jk & J30 if anyone is looking:
 

shays4me

Adventurer
Has anyone on here modified the latches up front to accommodate a larger awning? Are the latches stainless steel or will the rust if i cut them? I really like the new ARB aluminum awning and I'm thinking of going that route.
 

86scotty

Explorer
They are stainless and I'm pretty sure you can cut them with no problems. I'm assuming you mean shorten them where flipping them will clear your awning? I actually just moved mine to the front corners but I was Raptoring my top so the fiberglass work was completely covered after.
 

shays4me

Adventurer
They are stainless and I'm pretty sure you can cut them with no problems. I'm assuming you mean shorten them where flipping them will clear your awning? I actually just moved mine to the front corners but I was Raptoring my top so the fiberglass work was completely covered after.
Yes, that's what I meant. I was looking at them and they're not really that tight to flip down so I think I can shorten one and it will still be functional.
 

JDaPP

Adventurer
The design was tweaked as Ursa Minor went but I have 007 and the changes that I saw were a switch to stainless hardware, the very top section was redesigned so that the very front had a different slant/more aerodynamic nose, it opened up taller, cutouts were added for awnings. I am sure there are more but those are the ones I know about.
 
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