I recently installed an after market cd player in a friends van. I used a
multimeter and found the constant, power, and used a battery to find the
positions of the speakers and all that. The problem I have is I can only
find the rear speakers. None of the wires are providing static to front
speakers. There are none in the doors, I checked under the panels but did
not want to pull the dash apart to check for those speakers until I asked
for some help.