I have a 2000 caravan sport and my airbag light came on and my front wipers as well, problem is I can not shut off the wipers until I pull the fuse I replaced the wiper switch and motor. (any ideas?)

 

There are 2 relays in the PDC, one is the wiper on / off relay and it supplies power to the wiper hi / low relay which picks the high or low speed brushes. The on / off relay is run by the BCM so if it is constantly grounding the relay, it either sees something that is telling it to, it is bad and has failed that way or the wire between the BCM and PDC is shorted to ground.

 

so where would start to look. check the BCM first?

 

swap the relay. If it still runs, unplug the BCM connectors, inside the car on the bottom of the fuse box. If it stops, then tough call, is it bad internally or is something telling it to run them, need a scan tool then.

 

put new relays in and unplugged the BCM and still runs

 

if you unplugged the BCM and the wipers still run, then the wire is shorted to ground somewhere. Unfortunately, there is no connectors between the BCM and the under hood fuse box.

 

Disconnect negative battery cable. Disconnect the BCM. Remove the wiper on relay. Now measure resistance to ground from contact #85 at the relay. Should have an open meaning infinite resistance. Contact numbers are on the bottom of the relay.

 

sorry I took so long to respond back I could not figure out what was wrong could have been the bcm or clock spring. instead I traded it in for a 2006 town & country with 48000 miles and $5300 later. thanks for all your help


thanks for all your help

 

That's one way to deal with it. The new owner of your old van can simply drive it on rainy days or get a qualified technician to troubleshoot and fix it.