Taillights not working

Okay, I will check that tomorrow. So I check with a test light where the fuses go into the box? Is there a specific relay for the running/tail lights?

I checked with a simple test light and there is nothing at the fuses. What now?

Can you let me know what the final resolve was please? I am experiencing the exact issue with my van! Thanks man.

Come to find out it was actually missing the relay for the daytime driving lights.

I just bought a used 2002 Dodge Caravan Sport. It is in pretty good shape but needs a few things, most of which I know how to do. Just these small things I don't.
I noticed my break lights didn't work (3 lights top middle and two sides), checked the fuse and it was blown so I replaced it. It was hard to see but I thought they were working, the top light was at least. I checked them again at night and the top was working, the bottom was not. Just running the basic running lights, but did not do anything when the break was pressed. I opened it up and only found it used two bulbs, both is great working order. I did though however notice where the previous owner had spliced into the cable to add lights for a trailer hitch. So I'm thinking that is the problem, I got some 18 gauge wire and plan to remove the extra wire for the trailer hitch I don't use and put the wires back together. So my question is could this be the problem why two out of 3 lights are not working, and secondly what is the basics for re attaching these wires after I remove the added spliced wires. They are spliced with black tape! Could this be something else?
After I take care of this, I will surely have more questions. I do not have know what to donate, I don't have much. This van is taking a lot of my money. I do not mind paying a little if that is okay.
Thank you for your time,
Josh Woods

I inspected the wires to the trailer tow lights, all seemed to be working great. I did that this morning, since I have checked every fuse that I have, changed the brake light switch, even changed the bulbs. The top middle light comes on but the bottom to do not. I am at my wit's end with this.
Any more suggestions would be greatly appreciated.
Thank you,
Josh

I discovered the windshield washer switch in my turn signal switch is broken. So I tested the signal again and it has some issues. So I hope I'm right about this, ordered a new turn signal switch. I know it and the brakes are all on the same circuit. So hope that is going to fix it. The part will be here Tuesday. I'll post a reply as to what happened.

I have no tail lights or running lights- but I do have brake lights
The directionals do not work- but I have working hazards
The dash lights do not work- but the digital odometer works and so does the radio

We have replaced the light dimmer switch
We have checked both inside and under the hood fuse boxes and relays

So I changed the blinker switch, no change to the lights. So I did a pro scan as Hmac300 suggested. It showed my right front ABS sensor was damaged. So I ordered and just replaced that this afternoon, still no change. The running lights still work, the third brake light works but when the brakes are applied the bottom two still don't light up. I'm getting really close to being beyond what I can do on my own.
I needed to reset the IOD, so I am in the process of that now. Taking out the fuse, removing the neg cable from the battery and waiting. As my sliding doors won't lock automatically. So in some weird hope, that the reset might fix the lights. Yet, I doubt it. I am at a complete lost, I have no idea how to do the wiring. What else have I missed that I may be able to fix. Hopefully I won't have to buy anymore parts. I'm down to 12 before the inspection is due and I'm lost. Thanks in advance for any help. Had a friend mention something about the circuit board?

Okay so I got to ask the stupid question. How to access behind the left rear quarter panel?

So this is where I am at. I've opened up the left rear quarter panel. Still haven't reach any relays but I'm still digging. This is new for me I've never went threw the quarter panel to find relays, so I'm learning as I go here.
I did however notice this wire in the pic. It is taped with black tape to the wires around it. It has a plug for a harness but so far can't find a harness that is missing anything.
So not sure if that may be the problem, I still can't find the relays.
Thanks!

Could this be in the BCM under the dash?