Multiple Electrical Issues?

chronicanomaly

New member
Well, where to start. I posted a little over a month ago about my cupholder lights not working, and there were some very astute comments made about the fact that they would likely not go out at the same time, and to check the connections, which I did, and they seemed fine. Since then, I have seen those lights work exactly twice, randomly, and I cannot seem to reproduce it.

My radio has had odd issues since I bought the truck a year ago. Several times the display has turned off, so I can hear the music but have absolutely no control over it.

Several weeks ago, my rear wiper blade wouldn't work, and neither would the rear washer fluid. The rear window was all the way up. I came out about an hour later to see if I could find any problems, and although the switch in the car would roll the window up and down, the one-press auto feature would not work. I restarted the car several times, and voila, everything began working again.

Last night, I was leaving the house, and my dad noticed that my driver's side headlight was out, a Silverstar which I replaced less then a year ago. We removed the bulb, it didn't look to be burnt out, and reseated it. The light still didn't go on, but after turning them off and on a few times, it turned back on, and has been working ever since. I replaced a driving light and a rear turn signal in the same week over the summer after they stopped working, and I am wondering now if they were also possibly related.

Sorry for the huge post, but I am stumped as to what could cause this. Talked to a service tech at Toyota yesterday when my dad was looking at a Highlander, and he basically said none of it sounded familiar, and there was no common problem he could think of. I'm guessing that is probably the best answer I will get, but wanted to see if anyone else had any opinions?
 
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If I were having those issues (as bizarre as this sounds) I would start under the hood.

I'd disconnect the battery cables and clean the terminals. While they were off I'd loosen, inspect and retighten the big wire on the back of the alternator. Next I would follow the + battery wire to the fuse block and loosen/retighten any connections that I could. Next I'd do the same on the ground wire. Without walking out to mine I can picture at 3 places where the ground attaches to the body and engine. Look at both sides and there may be a ground on the rear of the negine too.

Reconnect the battery cables and reinitialize the radio, windows, roof etc.

Bad ground and loose connections of the battery/alternator can cause crazy little spikes in voltage that can mess up all kinds of stuff.

Good luck.


:cheers:
 
Thanks a lot Chris, I'll go out and do all of that in an hour after the game is over, and hopefully that will make some difference.
 
chronicanomaly said:
Well, where to start. I posted a little over a month ago about my cupholder lights not working, and there were some very astute comments made about the fact that they would likely not go out at the same time, and to check the connections, which I did, and they seemed fine. Since then, I have seen those lights work exactly twice, randomly, and I cannot seem to reproduce it.

My radio has had odd issues since I bought the truck a year ago. Several times the display has turned off, so I can hear the music but have absolutely no control over it.

Several weeks ago, my rear wiper blade wouldn't work, and neither would the rear washer fluid. The rear window was all the way up. I came out about an hour later to see if I could find any problems, and although the switch in the car would roll the window up and down, the one-press auto feature would not work. I restarted the car several times, and voila, everything began working again.

Last night, I was leaving the house, and my dad noticed that my driver's side headlight was out, a Silverstar which I replaced less then a year ago. We removed the bulb, it didn't look to be burnt out, and reseated it. The light still didn't go on, but after turning them off and on a few times, it turned back on, and has been working ever since. I replaced a driving light and a rear turn signal in the same week over the summer after they stopped working, and I am wondering now if they were also possibly related.

Sorry for the huge post, but I am stumped as to what could cause this. Talked to a service tech at Toyota yesterday when my dad was looking at a Highlander, and he basically said none of it sounded familiar, and there was no common problem he could think of. I'm guessing that is probably the best answer I will get, but wanted to see if anyone else had any opinions?
I guess I would start by checking all grounds. Have a good look at both sides (top and bottom) of both fuse boxes looking for corrosion and loose plugs. Try reseating all plugs at the fuse boxes and the body ECU. Chronicanomaly sure fits this!
 
Last edited:
Electrical problems

I just noticed your post on the CB install. Did these problems start before or after the CB install?
 
Re: Electrical problems

drmorbius said:
I just noticed your post on the CB install. Did these problems start before or after the CB install?

The headlight issue and the rear window issue happened a week or two after the CB install, but all the other issues were there beforehand. If the rear window issue was a random thing, it could have theoretically "happened" before, and I just never tried to wipe the window while it was not working.

Going out to clean/check all grounds/terminals now...
 
Re: Re: Electrical problems

chronicanomaly said:
The headlight issue and the rear window issue happened a week or two after the CB install, but all the other issues were there beforehand. If the rear window issue was a random thing, it could have theoretically "happened" before, and I just never tried to wipe the window while it was not working.

Going out to clean/check all grounds/terminals now...

how did this turn out for you as i am having the same troubles with the rear door electronics.
 
I cleaned the grounds/connections, but the cupholder lights still will not go on.

The rear window issues/headlight issues have not happened again, but had only happened once to begin with, so I'm not sure if it fixed anything or not.

As for the rear window, there are multiple threads about issues with the rear wiper not working, and some about the key fob not working either.

The proposed solution seems to be to use the interior switch to roll down the back window, then roll it back up and hold it closed for several seconds, then try everything again. The rear window wiper does not work unless the rear window is rolled all the way up, so there is a possibility these sensors could just have some chronic problems. Rolling the window down and making sure it then goes all the way up, as well as restarting the car, seemed to work for me. Hope that helps.

:beer:
 

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