[T2] My last post???

[Scott Busby]

Each bulb takes a ground (usually brown) and a 12v+ wire (not brown). It
doesn't matter which side is which, the bulbs don't care about polarity.
But you must make sure not to short a ground and a 12v on the same
connection terminal! A connection terminal will have two or three ground
wires, and another connection terminal may have a couple of 12v, as the
power is daisy chained along all the bulbs. Besides ground being usually
brown, you can pretty easily trace the grounds back to where they bolt down
to the chassis. I usually use a volt/ohmmeter to test the ground wire, with
one test lead touching the chassis and the other on the space of the wire
you are wondering about, you should have zero ohms resistance if it is
ground. After 35 years, quite often the wires no longer have their original
factory colors, so its best to test.

Scott
74 Bus