Plague Boy

My friend's 2001 Accent has an inoperative rear defroster. I
checked the fuse a while back and it seemed to be OK.

He's bringing over this weekend so I'd like to fix it for him. I
have fuses, voltmeters etc so I'd just like to know what to
check. I don't have a shop manual for the car.

Since everything else works, I presume I can rule out
battery/alternator/ignition switch type problems.

Which leaves:

Fuse

switch

Defrost element

assorted wires, connectors and grounds


Would there be an electronic timer module to turn the defroster
off? Where would it be and what would it look like?

Any information to speed up resolution would be appreciated.

PB

Mike Marlow

"Plague Boy" <plague_boy@earthlink.net> wrote in message
news:13id3m7ca2b9u67@corp.supernews.com...
> My friend's 2001 Accent has an inoperative rear defroster. I checked the
> fuse a while back and it seemed to be OK.
>
> He's bringing over this weekend so I'd like to fix it for him. I have
> fuses, voltmeters etc so I'd just like to know what to check. I don't have
> a shop manual for the car.
>

Sure you do. Just go out to hmaservice.com and sign up for a free account.
Use IE as the site does not support Mozilla or any other browser but IE.
You'll have to download the adobe SGA viewer but there is a link under the
required software section.

After that, you've got your shop manual at your fingertips.

--

-Mike-
mmarlowREMOVE@alltel.net

hyundaitech

Don't discount the alternator just yet. The electronic timer module
(ETACM) monitors system voltage. If it's too low, it won't turn on the
defogger because it presumes the car isn't running. I don't recall ever
seeing this issue, but it's a possibility.

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Plague Boy

hyundaitech wrote:
> Don't discount the alternator just yet. The electronic timer module
> (ETACM) monitors system voltage. If it's too low, it won't turn on the
> defogger because it presumes the car isn't running. I don't recall ever
> seeing this issue, but it's a possibility.

Thank you, HT and Mike. I downloaded the info on the defroster.
Unfortunately, it got cold and dark by the time I finished with
the oil change. I have ascertained:

1. the alternator seems to be putting out 13.5 volts +-

2. The defroster switch illuminates when the tail lights are
turned on.

3. There is a click from under the dashboard when the switch is
depressed, and a slightly different click when it is depressed again.

4. What I presume is an "on" indicator light built into the
switch does NOT illuminate.

I'll have to see if I can find the whole wiring diagram online
at work tomorrow, since I'm using Firefox on a Mac here. I'm
guessing the switch and defroster are OK, and the fault is in
whatever powers the defroster and the indicator light.

Sorry, I'm not usually this half-assed, but everything is going
to heck right now!

PB

hyundaitech

We're probably safe to presume that the indicator is out for the same
reason the defogger isn't working. The click indicates that the relay
inside the timer is opening and closing (although not necessarily making
electrical contact).

Check first fuse #9 (20A, left side bottom of interior fuse box). It's
the most likely culprit. If okay, then you'll need to check the wiring
between the fuse and the timer or relay, and then whether there's power
coming out of the timer or relay.

Looking at the schematic, I see there are two different systems-- one with
a defogger timer with a built-in relay, and another with an ETACM with an
external relay. If my suspicions are correct, all U.S. models have the
ETACM.

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Plague Boy

hyundaitech wrote:

<snip>

> Looking at the schematic, I see there are two different systems-- one with
> a defogger timer with a built-in relay, and another with an ETACM with an
> external relay. If my suspicions are correct, all U.S. models have the
> ETACM.

Thanks. I'll see if I can get him to bring it back. I just
destroyed the distributor in my Nissan (waah!) so I'll be staying
home when I'm not at work :-(

PB