BenK wrote:
Depends on how the OEM designed the electrical system...especially their grounding system
If they ran a separate ground wire (costs more) then wnjj is right, but if they used the metal of the vehicle, then yes parts can still work, while the parts not grounded or grounded well will not work
IMHO, a major El Cheapo fault of most trailer OEMs...am sure there are some fine ones out there...but on these forums...seems most are NOT...
drsteve wrote:
wnjj wrote:
It can't be the ground wire. The brake lights work but several tail/marker lights don't. That's a problem with the hot wire.
It can always be the ground. Never say never.
Agreed, but with a frame ground (likely on trailers), one local ground fault will not make multiple lights fail. That can only happen with a shared ground. Furthermore, how can the higher wattage brake light filament work when the tail light doesn't? The ground is the same exact connection on the bulb.