My 2000 T&C Limited has had a problem with the locks locking/unlocking on
their own. I located the power lock relays that the owner's manual and
Haynes manual say are only serviceable by the dealer and neither gives
there locations that I could find. I removed them, cleaned the contacts
and replaced them. I also disconnected and reconnected the switch
connected to the rear hatch lock cylinder. The van gave me no trouble
today whereas before doing this the locks would've gone nuts many times.
On the junction block under the dash there are relay locations numbered
just above the relays which means you can't see the numbers with the
relays plugged in. The top row has 2 relays with a yellow one in the far
right slot on the top row.
--The first relay on the far left of the top row is numbered "relay #1".
It has 56006707-95425c printed on the face of it. With this relay removed
only the driver's door locks/unlocks with the key fob.
--The relay to the right of "relay #1" is "relay #2". It has
56006707-83159-2525 printed on the face of it. With this relay removed and
#1 in place the driver's door only unlocks with the fob and will not lock
with the fob.
--Below those relays is another row of relays. "relay #5" has
56006707-95425C printed on the face of it. Without #5 plugged in but with
#1 and #2 plugged in all doors lock/unlock with the key cylinders and the
fob except the driver's door lock.
--While using the fob to actuate the locks I heard a relay clicking under
the hood. With a stethoscope I found that the HORN relay actuates every
time the key or the fob is used to unlock to the doors. This I'm guessing
is due to my van having a security system. If you reach in through an open
window and unlock the doors the horn will go off. However if I pull this
HORN relay the locks still work correctly.
Thanks for everyone's help with this problem.