My 2003 elantra all 4 windows stopped working. checked 30 amp fuse in dash.. was good. checked relays box with fuses in it under hood. Didnt see anything blown. What else could cause all 4 windows to stop working?

Look at the master switch connector terminal #6 is a yellow wire jumper battery positive there Terminal #9 is a black wire this is the ground wire jumper it to a good ground.
There's a 30 fuse or fuse link in the under hood fuse block check it,
locate the power window relay on the left end of the dash and swap it with one having the same number, if there's not another relay use a small jumper wire to jumper terminals #4 & #5 together to bypass the relay.
I hope this helps. Take Care.

A/C compressor clutch relay in the under hood fuse box . Check fuse F1.105 30 amp under hood fuse box . Also check fuse F2.14 7.5 amp location central junction box Central Junction Box (CJB) (14A068)
under dash panel, LH side, bottom .

• The air conditioning (A/C) is inoperative/does not operate correctly

• Open fuse.
• A/C clutch relay.
• Circuitry short or open.
• A/C low charge protection switch.
• A/C system discharged or low charge.
• A/C compressor clutch.
• A/C evaporator discharge air temperature sensor.
• A/C pressure sensor.
• DATC module
• PCM

• Go To Pinpoint Test K .

Check in fuse box under hood and dash look for blown fuses and bad starter relays. Also check ground cable from battery this needs to have a good connection. Could be a bad positive cable connection to starter solenoid. Well there's a list of things to check. Hope this helped

the fuse box is almost located in the sane spots on all cars 1. under drivers dash by E-brake cable. 2. on drivers lower dash around were your left knee is. 3. on the end of the drivers dash where the door panel touches it. 4. on the end of the passengers dash where the door panel meets it. 5. under the hood in a black plastic box, which will say fuses & relays on it. Then there is one other place on the passegers side of the center consule by where your left foot goes.

i have bad news for you the seats and door looks do not chair a common fuse.

power door locks, 4 fues in this system

in the under hood fuse box fuse # 16 15amp, fuse # 2 30 amp, fuse # 22 20 amp
in side fuse box behing left side of the dash fuse # 20 5 amp.

power seats

in side fuse box behind left side of dash fuse #1 30 amp, fuse # 2 30 amp.

When this happens, there is no charging system voltage (from the alternator). Several possible causes

1. Alternator's regulator has stopped working
2. Alternator fuse (100 to 120 amp) is blown (at battery post or inside Fuse/Relay box under the hood)
3. Wiring between alternator & battery &/or fuse/relay box.

First check the relay under the hood. Drivers side fuse box. Cover has a map of where fuses & relays are for you model. If relay good & getting power . Pump bad. When you turn the key to acc. you should here the pump turn on. Check relay first.

the clicking u can hear is the relay for the window clicking, so i would say thats working, but u can also check with a multi meter, could also be the motor for the window, check all your fuses as it could be that also if its blown a fuse there is ur answer. and clean the window switch.

look for a 30 amp circut breaker in location # 62 in the power distribution box in the engine compartment

There are 3 fuses that control the rear defogger, and 1 relay

The fuses are: 10 amp HEATER, 10 amp MIRROR-HEATER; under the dash
The 30 amp DEF fuse is in the fuse box under the hood
The relay is the DEFOGGER relay, which is on the back side of the fuse panel under the dash

Also, check for a loose wire on the defroster grid (on the back glass), this is the most common problem.