2003 ford e350 superd duty bt cruiser

[Damon]

I can’t seem to figure out why any of my marker lights will work. I have rear driver side brake lights on the bottom nothing on top nothing on passenger no power going to the harness at all for the right side. Can’t seem to find where to order another and when following the harness I loose it so does anyone have any diagrams also I checked fuses under hood under wardrobe and under dash on driver side none are marked so also need diagrams for that Google is not much help

 

[Just two]

Sounds like a grounding issue. I found that the top front marker lights aren’t sealed very well. Water leaks in at the wells in the fiberglass at the marker lights. This happens more when driving in a rain storm, water is forced in.

 

[THenne1713]

I can’t seem to figure out why any of my marker lights will work. I have rear driver side brake lights on the bottom nothing on top nothing on passenger no power going to the harness at all for the right side. Can’t seem to find where to order another and when following the harness I loose it so does anyone have any diagrams also I checked fuses under hood under wardrobe and under dash on driver side none are marked so also need diagrams for that Google is not much help

Rear tail/turn/stop light fuses in RELAY/FUSE CENTER, under hood forward of driver, near radiator.= 1-2 of the SMALL RED (10a?);

IF YOU TOW, Inspect/ repair rear tow harness BEFORE REPLACING ANY FUSES. Otherwise, check bulbs/ sockets? Good Luck. (FYI/TIP: FRONT Turn Signal/Parking lights in fuse panel under dash)

 

[Just two]

I noticed that there isn’t a third brake light on my 2021 5210. Troubleshooting the issue I found the front marker light’s wire comes from the right passenger side tail light. It is one of the two sets of wires travel up. The second wire goes to the 2 passenger side rear markers. The wiring goes to the driver side tail light first. And is supplied by a wire travel back on the driver side frame on the inside. Hope this helps anyone with problems.

 

[Just two]

Solved my brake light issue. We were followed by a friend and in camp he commented that it was hard to see our brake lights. He was driving a lifted F450 so his view was higher. I added two LED lights $15 from Amazon. They act as both brake lights and turn signals. Just dropped a wire and connected them in parallel with the lower brake light. They are pretty bright.
I also added a second reverse light to each lower tail light. There was an unused socket on each lower tail light. (First picture). Brakes are on in both pics.