1998 Caravan Rear Defroster

[adrummond3]

Rear defroster doesn't work. Dash lite works and no fuses appear to
be blown. What to check next?

[Bernard Feltzer]

I thought the rear defroster used a circuit breaker.
Get a voltmeter and measure the voltage going to the rear window defroster connections on the window.

[adrummond3]

Thanks for the reply. I can't seem to find where the connections are. The
brake and wiper are easy as there is a removable plastic cover. The wires
from the front seem to be at the top of the door and go through grommets.
I looked under the dash (and online) for circuit breakers. I didn't see anything
that I recognized as one.

Originally Posted by Bernard Feltzer

I thought the rear defroster used a circuit breaker.
Get a voltmeter and measure the voltage going to the rear window defroster connections on the window.

[Stretch58]

Originally Posted by adrummond3

Thanks for the reply. I can't seem to find where the connections are. The
brake and wiper are easy as there is a removable plastic cover. The wires
from the front seem to be at the top of the door and go through grommets.
I looked under the dash (and online) for circuit breakers. I didn't see anything
that I recognized as one.

Check right on the side of the window grid for 12V.
In the 2000 wiring diagram, Fuse F12(10A)(in Junction Block) feeds the coil of the Rear Window Defogger Relay in the Junction Block. Fuse108(40A) in the Power Distribution center feeds the output contacts of the Defogger relay. The main suspects would be the window grid, the relay and the fuses. Usually the fuses will blow for a reason though, not because of old age.

[adrummond3]

Thanks,

I'll take a closer look with the info. The van was AWOL for the weekend. We're probably going to replace the van this summer but the rear window
defrost is nice here in Rochester, NY.

Originally Posted by Stretch58

Check right on the side of the window grid for 12V.
In the 2000 wiring diagram, Fuse F12(10A)(in Junction Block) feeds the coil of the Rear Window Defogger Relay in the Junction Block. Fuse108(40A) in the Power Distribution center feeds the output contacts of the Defogger relay. The main suspects would be the window grid, the relay and the fuses. Usually the fuses will blow for a reason though, not because of old age.