Does a trailer dome light work off a different fuse than the running lights?

Some people wire trailer plugs differently. If the plug is not wired differently than yours, make sure the tow ball is clean. No rust. That's where the trailer gets its ground from. Usually they will work if thats the case, but not right. I can't remember what the wire colors are right now. Go to etrailer and look up the diagram.

If the fuse blows on different trailers then it's all down to the vehicle. You either have incorrect wiring on the vehicle, a short OR the fuse is not of a high enough value to cope with the additional brake lights? You could try removing all the trailer bulbs EXCEPT the brake lights - e.g. if it's trying to power up the indicators too? That would stop the fuse blowing...... OR remove the brake bulbs from the vehicle & see if it operates the trailer without blowing...... Check the total wattage of ALL the brake lamps & see if the fuse is actually of a high enough rating? Be aware though that increasing the value of the fuse could cause damage elsewhere! As a rough guide a 25 watt bulb will pull around 2 amps at 12 volts - so 4 bulbs may pull up to 8 amps & clearly blow a 5 amp fuse! If in doubt take it to an auto electrician...... The wiring needs to be correctly protected!

I have the same problem.

Skins, I am sending you a schematic for the dome light.. Check fuse #27 in the Instrument fuse panel. It should be a 10 amp fuse. It on another drawing than this one.. Best of Luck!!

if power on it its a bad ground from pig taill to trailer or to dome assembly

Did you check the fuse for the trailer tow adapter paring lamps ? This is a separate fuse powered by a relay, it is not the same circuit as the truck's parking lamps.
This is fuse # F10 & The half size ISO relay, R201 in the fuse panel in the passenger side kick panel.
This is based upon being a new body style 2004, not the 2004 Heritage or Lightning models, those are different fuse & relay locations.

you bcm (body control module is bad) to have the dealer replace it will run you about $400. a quick fix for the reverse light is to splice 2 wires into the wire for the center plug in your trailer wiring. now run a wire up to each reverse light, cut the green wire to each reverse light and **** conect them up. this is a seperate revers feed than the one from the bcm. the dome lights remove the light cover on the second set of interior lights (the one between the drivers seats). the two side bulbs are map lights the center bulb is for the dome lights. run a jumper wire from the right or leftside socket to the center socket. you dome lights will now turn on with just the use of that switch i replaced the back bulbs with led's soo there is no extra amp's being drawn. you could bypass the bcm but i could not find any wiring diagrams for it and i dont know if it can take the added amp's

I have the same problem, not sure, but I think it is related to my headlight switch. My windshield leaks and the switch has water damage. Check at your trailer light harness to see if you have power there, it runs off a separate circuit/fuse.

They are spliced in. Your problem sounds like a bad earth to your trailer. Check you have a good earth as its a very common problem with trailer light's when a few lights are out.

check all trailer tow fuses in panel under hood.there is a fuse for trailer brake lights and a fuse for trailer signals.but if one signal is working it is probaly broken or corroded wires at the back of the trailer plug or corroded wires inside plug.