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Windows, HVAC, Turns not working...Nothing blown...then work

Old 09-06-2006, 09:49 PM
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Default Windows, HVAC, Turns not working...Nothing blown...then work

I have been hooking up my new system. I blew a fuse and replaced it. Everything worked fine. I go to get in and go somwhere, and My power windows dont work, my HVAC (heat, AC, fan) doesnt work, and my turn signals dont work. Everything else works including sunroof, power locks, dash, clock, cig lighter. horn and all.Checked all my fuses and they are good.

I take it straight to the dealer, they had a guy look at it in the lot. Checked all the fuses and has no clue. He told me to tell them to put it in the shop. The guy at the desk said drop it off tomorrow and they would figure it out at no cost.

I said thanks, go outside get in, and EVERYTHING WORKS!! They said they can only fix something that is broken so if it happens again bring it in.

What could be the cause? nay help would be great.
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Old 09-07-2006, 12:33 AM
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any ideas?
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Old 09-07-2006, 12:36 AM
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Gremlin? Just kidding...
If a fuse, relay, or fusible link is bad, they are cooked and won't come back on. They need to be replaced. Maybe it's a broken wire that is making an intermittent connection?
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Old 09-07-2006, 12:40 AM
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This is an ignition switch issue. This is why everything stopped working all at once. The reason for it coming back on is the relay in the ignition can usually short, but then come back. Had the exact same thing happen in my previous audi. Broke, lost everything, came back a couple of time then that was finally it. Replaced, (melted shorted part) and everything worked again. Check it out. I bet you this is the issue.
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Old 09-07-2006, 12:47 AM
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Whats weird is the things that went out, arent on the same fuse, that I know of. And if its a wire, those are odd things to run the same wire. Turn signals, windows, and hvac in one wire.

The ignition switch kinda makes sense, but why wouldnt it be everything?
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Old 09-07-2006, 12:57 AM
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Originally Posted by Nick06tC
Whats weird is the things that went out, arent on the same fuse, that I know of. And if its a wire, those are odd things to run the same wire. Turn signals, windows, and hvac in one wire.

The ignition switch kinda makes sense, but why wouldnt it be everything?
Not everything runs into the ignition. Look at it this way, the ignition is one of the few places that you can get a 12v acc current without a rocker switch switch, instead just a turn of a key. So wipers, HVAC, radio, by turning the key all turn on, along w/ the turn signals. Now each car is different in its wiring methods, but that is what the ignition switch is for, and the relay carries a greater load to handle this. I assure you that if it happends again, that you are going to have to replace it. Cheap part but difficult to get at and replace on most vehicles. Haven't done a scion yet, but you can imagine audi's!
Good luck
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Old 09-07-2006, 01:21 AM
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I will deffinetly have the dealer make a note of it. Thanks for the word on it.
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Old 08-18-2011, 05:22 AM
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I need to figure this out because I am going through the same thing...
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Old 08-24-2011, 04:19 AM
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I had the same issue with my tC when I put my new radio in it.. the driver window would work one time and the pass not and later the pass would and driver wouldn't.

What I did was took my radio out made sure all the wires had a good connection and put it back together.

Haven't had any issues since.

Last edited by MR_LUV; 04-06-2018 at 09:38 AM.
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Old 08-24-2011, 04:25 AM
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Problem solved. 10amp gauge Fuse under the dash made all that trouble.

Ironic, given the label I figured it would only take out the cluster. Instead it took out everything not related to the cluster. Also I know now how this was caused.
My aftermarket fog lights fuse housing somehow ended up having an exposed wire which touched metal in the engine bay. Normally in this situation the fuse to the fog lights would blow.
Instead It blew up with enough heat to melt and fuse itself back together allowing the fuse to now hold more amperage and now carrying the current to the next weakest link in the circuit
which was one of my fog light bulbs and and also the fuse the made all the trouble with other accessories.

I sure learned a lot from this mess.

Last edited by MR_LUV; 04-06-2018 at 09:42 AM.
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Old 12-22-2016, 08:33 AM
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I was wondering if you figured out what's going on with the Scion tC? Mines doing the same exact thing.

Last edited by MR_LUV; 04-06-2018 at 09:35 AM.
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Old 12-31-2016, 04:42 PM
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so what was the label?????????????
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Old 01-04-2017, 11:03 AM
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Any luck I can't figure it out turn signals backup lights hvac no power at all just clock works none of the bottons work at all cig lighter and Windows! Please help! Is getting cold out and the dang heater don't work
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Old 04-06-2018, 08:02 AM
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Originally Posted by jordan06tc View Post
Any luck I can't figure it out turn signals backup lights hvac no power at all just clock works none of the bottons work at all cig lighter and Windows! Please help! Is getting cold out and the dang heater don't work
same problem man ever find a fix?
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Old 12-31-2018, 10:36 PM
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Originally Posted by scion95broke888 View Post

same problem man ever find a fix?
I just ran into this problem! Anyone figure out how to fix?
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Old 02-09-2019, 08:19 PM
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Default Solved: turn signal, reverse light, gear lights not coming on

Originally Posted by Garciag123 View Post
I just ran into this problem! Anyone figure out how to fix?
I know this thread is fairly old, but the problem was never really “solved.” The 10a fuse that I found was blown when my turn signal/ reverse light / gauge gear lights were not working was the 10A Gauge fuse. Try replacing that.
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