Question about 1999 Toyota Camry Solara

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What does each wire do on the rear defroster harness

I need to know what each wire on the rear defroster harness does on a 1999 toyota solara, that way I am able to attach my viper alarm up to it. Thanks.

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What's the brake bleeding order on a 1999 Toyota solar a

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Radio Battery Constant 12v+ Wire: Blue/Yellow
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How to replace a starter on a toyota solara v6

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I also have a '99 Solara. I hate the DRL's also, and had to disable them when I got Xenon headlights. What you have to do is remove the trim around your radio. To do this gently use a flat head screwdriver and pry around the outside. This doesn't take too much effort. Then unscrew the 4 bolts holding the radio in and remove the radio. Now look behind the radio and to the left and you will see a blue wire harness plugged into a module. You need to unclip this harness from the module (was hard for me because of my big hands) but eventually you will get it. Now look at the wire colors and find the red wire with blue markings on it. Thats the one you want to pull out. You cannot just pull this wire out. You need to carefully open the harness with a safety pin, carefully unsnapping it and exposing all of the wire ends. Pull out the red/blue wire and tape it back. Plug harness back into relay and test your work before reassembling everything.

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Rear Window, Rear Defrost stopped working

I suspect that the back door ECU (the relay box that you speak of) is bad.
Unfortunatly common.
Here is how you check:
With the Key On, you should have 12 VDC in the Solid YELLOW wire going into the box.
Also, You should have power in the solid BLUE wire going into the box.
Operating the switches should transmit power to the BLUE with RED trace, and the VIOLEt with WHITE tracer.
If you have the right power as described abobe, the box is indeed bad. This is a dealer item only, cannot buy one at the local parts store. Sorry. Hope this helps.

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