I've never worked on an xcab, but it sounds like a ground problem and have
seen similar weird problems on other cars.
A large body part is not making good ground contact. The current that would
normally go through this part, now finds a way through another part. This
other part normally only carries current to other components. More current
through one path also means a higher voltage drops across that path, so it
could cause significant drops in supply voltage to some components. Remember
Ohms law, E=IR, from highschool? The (R)esistance does not change but the
current(I) has increased so the voltage drop(E) increases.

Try this: get a booster cable. Tie the black lead to battery. Do not use the
positive - just let that dangle. Using the other side of this booster cable
(the black part), make connections to components you know should be grounded
(frames, etc) and try turning your lights on to see if it makes any
difference. When you find a point where it makes a difference, you've got a
clue what panel is missing ground.

Hope you find it.
Remco

hello, i have a nissan micra si 1300, 1998 model. my left indicator bulb
keeps blowing?

            thanks chris