Originally Posted by overyander
oh, and i don't think it's anything between the switch harness and the fuse because the fuse doesn't get voltage until i turn the light switch on. If i'm mistaken about how that works please let me know.
IMHO you need to chunk that test light your using and buy a digital meter from ???? try Harbor Freight. For ten bucks you can find one that has many features of which you only need the DC VOLT set at 20vdc.
The ILLUM fuse is on the BATT bus and should have power 24/7 if the BTN fuse in the engine bay is any good (feeds the batt bus in the interior).
If you already have a meter......then I don't understand what your doing at the fuse as you describe turning the light switch to on and now getting voltage to show up on the meter.
IF the fuse is pulled out, the touching the pos lead of the meter to the side of the fuse slot with the W/R and the other meter lead to the W/G side of the fuse slot results in no voltage until the light switch is turned to on. See attached jpg.
So I'm asking..........if the neg meter lead is touching a known gnd, when you put the positive meter lead to the fuse slot, do you see batt voltage? Only one side of the slot is hot and I can't tell which it is from sitting here. Probably the bottom side of the fuse slot.