Where is junction box 1 in a 1995 Toyota Camry? It is supposed to be under the dash.

The power window master switch is supplied from the power main relay and M-fuse located in junction block 1, under the dash on the driver's side. See here p-9
http://www.turboninjas.com/camry/be.pdf

As by heat only works some of the time , you mean it doesn't blow air out of the vent's . This means you probably have a problem with the blower motor or blower motor resistor or blower motor relay .
Rear Window Defogger Inoperative

Exchange the rear defogger relay with a known good relay from the under hood junction block.
1. Turn the ignition switch to the ON position.
2. Press the rear defogger switch to the ON position.

Does the rear defogger grid warm?
--
Yes Go to Step 2
NO Go to Step 3

2

Replace the faulty relay.
Is the repair complete?
Go to Defogger System Check --

3

1. Use a fused jumper wire in order to backprobe between terminal A4 of underhood junction block connector C3 and ground.
2. Use a test lamp in order to backprobe between terminal C5 of underhood junction block connector C3 and ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 23

4

1. Use a test lamp in order to backprobe between terminal C5 of underhood junction block connector C3 and ground.
2. Press the rear defogger switch to the ON position.

Does the test lamp light?
--
Go to Step 5
Go to Step 14

The power window master switch is supplied from the power main relay and M-fuse located in junction block 1, under the dash on the driver's side. See here p-9
http://www.turboninjas.com/camry/be.pdf
.

All here and already answered on Fixya. Videos and Fuse Box Diagram in the link. Manuals are also available online

https://www.google.com/search?q=2007+Toyota+Camry+LE.+Power+window+relay

Power window relay location 2007 toyota camry le---if under

https://www.fixya.com > Forum > Cars & Trucks
Oct 13, 2011 - Fuse box is by drivers left knee. Above this are the flashers and about 3 inches above this is the circuit breaker for the windows and door ...
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https://www.google.com/search?q=2007+Toyota+Camry+LE.+Power+window+relay

The fuses are located behind the coin holder to the left of the steering wheel. There's a fuse and a relay related to the rear window defogger unit. Scroll through the images here for help:

https://www.google.com/search?q=96+toyota+camry+rear+window+defroster+fuse&client=firefox-b-1-ab&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiGlcTdi7LZAhVFUt8KHeckBGAQsAQIPA&biw=853&bih=639#imgrc=IpWGUHbSuU5qWM:
96 toyota camry rear window defroster fuse Google Search

Rear Defogger Inoperative, But Heated Mirrors Operate Correctly
1. Connect scan tool. Turn ignition switch to RUN position. Turn rear defogger on. Using scan tool, display BCM
outputs. If rear defogger is being requested on, go to next step. If rear defogger is not being requested on, go to
step 10).
2. Ensure ignition switch is in RUN position. Remove rear defogger relay from rear junction block, located on center
right rear of passenger compartment, under rear seat. Connect test light between ground and defogger relay
harness connector terminal F3 (Brown wire). If test light illuminates, go to next step. If test light does not
illuminate, go to step 11).
3. Connect test light between ground and defogger relay harness connector terminal A2 (Red wire). If test light
illuminates, go to next step. If test light does not illuminate, go to step 12).
4. Connect test light between defogger relay harness connector terminals A2 (Red wire) and B3 (Purple wire). If test
light illuminates, go to step 13). If light does not illuminate, go to next step.
5. Disconnect rear defogger positive and negative feed bus connectors. Connect a jumper wire between defogger
relay harness connector terminals F3 (Brown wire) and A4 (White wire). Connect test light between ground and
positive feed bus connector terminal "A" (Black wire). If test light illuminates, go to next step. If test light does not
illuminate, go to step 8).
6. Connect test light between positive feed bus connector terminal "A" (Black wire) and negative feed bus connector
terminal "B" (Black wire). If test light illuminates, go to next step. If test light does not illuminate, go to step 9).
7. Repair open in Black wire between rear defogger and ground. Recheck system operation.
8. Repair open in Purple wire between rear junction block and heated backlight antenna module. Recheck system
operation.
9. Check for proper terminal contact at rear defogger connectors. Repair as necessary. Recheck system operation.
10. Check for proper terminal contact at BCM. If terminal contact is okay, replace BCM. Recheck system operation.
11. Repair open in Brown wire between rear junction block and instrument panel junction block. Recheck system
operation.
12. Repair open in Red wire between rear junction block and underhood junction block (located in right front corner of
engine compartment, between battery and strut tower). Recheck system operation.
13. Connect test light between defogger relay harness connector terminals F3 (Brown wire) and A4 (White wire). If
test light illuminates, go to next step. If test light does not illuminate, go to step 16).
14. Reinstall defogger relay. Disconnect BCM 32-pin Pink connector C2. BCM is located behind right side of instrument
panel, near rear of glove box. Using DVOM, check voltage between ground and BCM harness connector C2
terminal A3 (White wire). If any voltage is present, go to next step. If no voltage is present, go to step 17).
15. Repair open or short to ground in White wire between rear junction block and BCM. Recheck system operation.
16. Check for poor connection at defogger relay terminals. If connections are okay, replace defogger relay. Recheck
system operation.
17. Check for proper terminal contact at BCM. If terminal contact is okay, replace BCM. Recheck system operation.

under hood fuse/relay box - #13 7.5 AMP fuse, controles Power mirrors, ABS system, Air delivery, Blower motor relay, Rear window defogger relay, Radiator fan relay, Condenser fan relay

#13 is top row of fuses 3rd from left side.

Radiator Fan Relay located right Rear Corner of Engine Compartment
3 black relays in a row, radiator fan relay 1st one on left side of box

There is a fuse and a relay,look under the hood in the fuse/relay box.
Some of the relays in the box will be the same part # as the rear window defogger relay.....switch it with another to check it.

All models have fuses, fusible links and relays found in various locations. One junction block (No. 1) is located within the cabin of the car, just under the extreme left side of the dashboard. This fuse block generally contains the fuses for body and cabin electrical circuits such as the wipers, rear defogger, ignition, cigarette lighter, etc. In addition, various relays and circuit breakers for other equipment are also mounted on or around this fuse block.

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.