Most or all of the relays are in the fuse box in the engine compartment (just above the battery if memory serves me). If you have your owner's manual, it will tell you which relay is which. I am shopping for this particular relay now (under $10) to see if that's why my rear window defroster doesn't work...since my voltage meter is broken...if you have a voltage meter, check the actual defroster lines on the windshield for a break and if part of it works and part of it doesn't...you can get a repair kit from a dealership and fix it yourself with a masking tape guide. Delores St. Louis East Hampton, CT
Dome lights
in power distribution center
It is located in the relay/fuse center under the hood on the drivers side.
relay
on the left side top of the bumper behind the grill.
That would be very unlikely.
There is an ac relay on the grand caravan. It is mounted on the inside of the driver side fender.
under the hood in the relay center
The horn relay may be faulty. Try replacing that.
location for cooling relay on 05 caravan 3.8l
One reasons a Dodge W 250 defroster may not work is the blower motor relay. This can be replaced easily. If it isn't the relay, there may be a problem in defroster door binding. A mechanic will be able to determine the cause.
The flasher relay is under the steering column.........the 4ways and the left and right turn is all in the same unit.