Fix Power liftgate problems — Dodge Caravan
If you own a 2005 Dodge Caravan/Voyager/Town and County and have power liftgate problems where the rear power door is not operating, here are some diagnostic tips:
The body control module (BCM) sends 5 volts out to the lift gate switch. When you flip the switch to open the liftgate, the switch grounds the circuit and the voltage falls to 0. The BCM sees this and tells the liftgate module to operate the lift gate. To check this, set your DVOM (do NOT use an analog meter to do this test) to 6 volts DC. Touch the positive lead to the Tan/Light Green wire going to the switch (ignition key in run position) and the black lead to ground. You should see 5 volts. If you do, then operate the switch while you watch the voltage. It should go to 0 volts. If it does not, you either have a bad ground or a bad switch.
If you see no meter movement, jumper the Tan/Light Green wire to the Black/Light Green wire (ground) and watch for 0 volts. If you see the voltage change, it means the ground is good and it’s a bad switch.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat