Meso Map Lights Blowing Fuses

Did you ever check to see if you have power and a ground at the lamp sockets? It can't get any simpler of a circuit:

Dome fuse 7.5 amp >> Map/Vanity/Room Lights >> Switches >> Ground.

If you read 12 VDC at the White wire and the White with black stripe reads continuity to ground then the issue is with the socket(s). As I understand only the Map Lights are not working correct. Then you probably have a blown trace from repeated shorting.

Damn, I hate poorly designed LEDs. I see more issues with them than solutions.

 

I pulled the overhead console itself and there’s good continuity between the sockets, their respective positive prongs, and the one ground in the center. I have not yet had the chance to plug it back into the truck and test the sockets for power. That was my next move when I have time this evening.

 

Hmmmm thats news to me that @MESO stuff is poorly designed.

 

In all fairness, I seem to be the exception with this product. Plenty of others have used his stuff without issue from what I’ve seen.

 

@MESO

 

It's just strange that originally it was only on that one side when they worked on the other side just fine and now nothing.

 

I’m also confused. I’m hoping it’s not the ground (?) in the overhead console itself that I fried. New ones ain’t cheap.

 

Hey OP sorry you are having issues. The first thing I would do is just visually check the back of the map light. Make sure wires aren't frayed, solder points look solid, etc.(We QC them, but you never know..it could slip by)
Then I would double check the wire leads from the map light are not getting pinched or cut up inside the cavity(if you left the chrome reflector in this issue could happen easier). Have you tired swapping LEFT TO RIGHT? This will rule out if its a bad map, or bad socket/circuit of the passenger side.


AFAIK the 2nd gens have 2 wires, GROUND and a 12V. Not PWM like the dome.


Worst case, i'll send you some new map lights to try. I honestly haven't had many issues with them.

 

I wouldn't know about MESO LED's specifically and I didn't say MESO LED's were poorly designed. There are Many threads on here with LED Lights causing all sorts of issues.

One day take a bit and search for LED Problems on this board... It is eye opening.

 

Bad news for me. Took my test light to the harness that supplies power for the map lights. Neither testing the harness itself or testing the map light sockets with the overhead console plugged in yielded any results. Dome light still functions, so that rules out the fuse.

I’m gonna have a closer look at that wiring diagram that was posted on here and see if there’s something else I should check on.

 

Make sure you have a good ground for the test light so that you don't go down a rabbit hole looking at missing 12 volts when it could be a bad ground connection.

 

The series of connections should be:

Dome Fuse >> White Wire to Junction Connector # 1 "C" to Junction Block # 1 "O" White Wire >> Pin 1 on the connector at the map light assembly White Wire.

Junction Connector # J1 should be in the drivers kick panel here:

 

Fist message saying this second message back tracking when if you would of read the OP post this is about the MESO maps so in essence your first comment sure enough did make the claim they were. Now I'll hold you to the same scrutiny and say go reading around a bit and very few if any issues are there with MESO's LED components and if there is an issue when a customer contacts he he fixes the issue. He also if you again read around a while takes his time and works on developing the product. So I would suggest before you make a blanket statement like you did in your first comment you do pay attention more to the thread.

Edit: Not to derail this thread anymore but back to helping the OP fix his issue here.

 

So the harness side has no power either? Did you read through the thread that was posted on the first page, it has a little more than we offered here. I would suspect that the ground you had for your test light wasn't good enough. Hook it up and check it at a constant power source like the fuses then go to checking the ckt. You can check the grounds by hooking it up in reverse too. I have a sneaky suspicion after reading the other thread it may not be the ckt but your overhead console. MESO offered to help fix it in the other thread. I'd also reach out to him other than this thread.

 

Whatever, you are entitled to your opinion ...

 

Meso has reached out to me and we’re talking right now. He’s a solid dude.

I’ve been using the exposed metal of the roof behind the overhead console as a ground. Is that not sufficient?

If my ground wasn’t good enough and the harness actually does have power, I do suspect the overhead console itself to be my issue.

 

I always double check by touching it to a known good power source. He is a good dude and when issues arose he's been quick to stop and fix or adjust them. Since he's helping you he can probably do more with helping you troubleshoot the maps more so than I can.

 

I’ll try it out when I get home to make sure it’s a decent ground. And thanks for all the advice up to this point. Everyone’s been very helpful and it’s not unappreciated.

 

Just installed mine and blown the fuses as well. Haven't had time to trouble shoot beyond the fuse box. Will update once Ive had a chance to do more testing.

 

Did you already replace the DOME fuse under the hood?

Today I’m going in search of the junction by the kick panel to see if that’s the culprit. Honestly, I’m not opposed to cutting the harness and reusing the OEM plug to route my own wires up the A pillar. The map lights don’t have anything crazy like door sensors the dome light uses, so I’d imagine it would be pretty straightforward.