Tail lights out, bang on them, they come back on?

pdx

New member
We love our 2000 4runner limited with 105K miles... but here are a few issues we'd like to resolve:

#1 The ABS light came on and stayed on yesterday. Took a reading, came back with #49 which I believe is related to a tail light issue. Noticed all 3 tail lights were out/off. Took my hand, banged on each of them, 2 out of the 3 came back on. This has happened on and off for years now, but getting scary since losing all 3 tail lights is very bad. Any idea of the root cause/fix for this issue? Replacing the bulbs doesn't seem necessary since they do turn back on, but I'm not understanding why they turn off... loose or something?

#2 The door unlock button doesn't work on any the key fobs we have. The lock button does work for all 3 key fobs, but for some reason, the unlock mechanism isn't working. I've tried replacing the battery, that didn't help.

#3 The air conditioning/heating system is very difficult to turn off. No matter what temp you set it too, you have to change it to "defrost/feet" and press the off button REALLY hard to get it to turn off.

None of these problems were occuring about 5 years ago, but slowly each has popped up.

Any advice is appreciated!
 
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1: Maybe a corroded/intermittent connector?
Seems reasonable to think so if banging on them can bring them back.

2: Bad switches in the remotes?
Do they "click" when the buttons are pushed?
You may just have to replace the remotes. They are 13 years old after all.

3:Again maybe a worn switch that needs replacing.
 
Electrical problem?

Thanks for the advice guys.

I just took a look at the sockets and the bulbs.

All of the bulbs look blackened on the inside (but some still work). The sockets look blackened as well.

What would cause that blackening? Is it possible the eletrical system is sending too much current (if that even makes sense)?
 
Thanks for the advice guys.

I just took a look at the sockets and the bulbs.

All of the bulbs look blackened on the inside (but some still work). The sockets look blackened as well.

What would cause that blackening? Is it possible the eletrical system is sending too much current (if that even makes sense)?

The blackening of the bulbs is normal wear & tear.
It's just the filament burning out. Check the other side as well while your at it.

The blackening of the sockets is just due to oxidation. Again wear & tear.
You should clean them before replacing the bulbs and coat the socket with dielectric grease first. This will prevent future corrosion.
 
Banging them and they come back on may be due the the filament broken and when you hit it, the filament bounces and touches and comes back on. They are black from the years of use. Replace the bulbs and use some dielectric grease in the sockets. Also make sure the bulb fully seats. They can be hard to push in all the way which can also cause the no work, hit, work scenario.
 

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