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Old 12-06-2010, 02:12 PM   #1
Judas Iscariot
 
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headlights not working....

Hello members, i have tried every search i can think of and nothing is helping.

a few days ago my headlights stopped working. i know this because i was driving at night and all was well, i remember using my highbeams on a particular road. anyway the next morning (i leave for work around 6:15) i started the car aND put my foglights on (i did the foglight w\ parking lights mod AND disabled DRL's) and when i was geting ready to pul out flicked on D\L and nothing.
Checked all fuses i could find and the bulbs are not burned out. Any help would be appreciated, before i take it to toyota.
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Old 12-06-2010, 04:26 PM   #2
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Check the bulbs first. It's not that likely that they both failed, but is worth a look.

Check the two H-LP fuses in the under hood fuse panel.

Check the ECU-IG fuse in the under dash fuse panel.
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Old 12-06-2010, 06:35 PM   #3
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Thx for replying. Will check tomorrow at lunch time.
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Old 12-07-2010, 02:01 PM   #4
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ok i checked and it was one of the fuses under the hood. unfortunantly when i replaced it, the fuse blew again...

i think the next step is to rewire things to stock (Looks like someone was messing around underthere that wasn't me!) and se what happens
any suggestions are welcome THX again
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Old 12-07-2010, 02:20 PM   #5
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Originally Posted by Judas Iscariot View Post
ok i checked and it was one of the fuses under the hood. unfortunantly when i replaced it, the fuse blew again...

i think the next step is to rewire things to stock (Looks like someone was messing around underthere that wasn't me!) and se what happens
any suggestions are welcome THX again
Which one was popped? From there I can guide you as to which wires to follow.
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Old 12-07-2010, 07:04 PM   #6
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The extremely difficult one to remove and put away. . Lol. If your standing in front of the car facing towards the rear, the left of the two you said to check.
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Old 12-07-2010, 10:38 PM   #7
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That's the fuse for the right hand side (sitting in the car) headlight. The fuse feeds the black wire on the headlight directly, and then the green and blue wires are the switched grounds for high and low beam. Since you are popping the fuse, the short has to be between the fuse and the bulb.
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Old 12-08-2010, 12:00 AM   #8
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Quote:
Originally Posted by CTScott View Post
Check the bulbs first. It's not that likely that they both failed, but is worth a look.

Check the two H-LP fuses in the under hood fuse panel.

Check the ECU-IG fuse in the under dash fuse panel.
I can't stress this part enough.

Oh nuts you already checked. Would a beefier fuse solve this problem? CT? I'm genuinely curious
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Old 12-08-2010, 08:42 AM   #9
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Would a beefier fuse solve this problem? CT? I'm genuinely curious
NOOOOOOOO! Putting in a bigger fuse generally results in doing far more damage. Wires have a current rating and the fuse value chosen for a circuit generally is a function of the ampacity of the wiring and the maximum current draw of the device(s) on that circuit. Installing a larger fuse often results in exceeding the ampacity of the wiring, and if there is a direct short in the circuit, the now underrated wires will get extremely hot, possibly hot enough to melt their insulation and burn other things (or create more shorting points).
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Old 12-08-2010, 02:10 PM   #10
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Agreed, i wouldn't think of using a larger fuse... and i did check to see if the bulbs are good, i can see both hi\low filaments, they are intact and the bulbs were less than a week old at time of origional post.

Thanks for the replys CT, but you were saying something about which wires to follow... if pictures will help i can have them on here tomorrow.
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Old 12-08-2010, 03:18 PM   #11
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Agreed, i wouldn't think of using a larger fuse... and i did check to see if the bulbs are good, i can see both hi\low filaments, they are intact and the bulbs were less than a week old at time of origional post.

Thanks for the replys CT, but you were saying something about which wires to follow... if pictures will help i can have them on here tomorrow.
Pictures would definitely help. The wiring harness to the right side headlight is housed in wire loom for all but a few inches on either end, so if the problem is with the OEM wiring it is almost definitely on one end or the other of the wire from the fuse panel to the bulb. The additional wiring, that you mentioned, is more likely where the problem lies, so pictures of that would help.
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Old 12-09-2010, 01:11 PM   #12
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Thx CT, i left my camera at home, so i'll take the pictures tonight and hopefully post them tomorrow.... i hate not having headlights!
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Old 12-24-2010, 03:56 PM   #13
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Ok. So I am still battling this problem. The headlights come on now. But the driver side light is acting funny, both of the filaments are coming on and they are dim in comparison to the other one. Which works correctly. I don't know how it got to the state it's inn now. But at least I can drive at night. Any more ideas CT? Thanks again in advance
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Old 12-24-2010, 04:25 PM   #14
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Originally Posted by Judas Iscariot View Post
Ok. So I am still battling this problem. The headlights come on now. But the driver side light is acting funny, both of the filaments are coming on and they are dim in comparison to the other one. Which works correctly. I don't know how it got to the state it's inn now. But at least I can drive at night. Any more ideas CT? Thanks again in advance
The H-LP/AMT Relay in the small relay box, on the passenger side, under the hood, may be sticking. You can try putting the HTR relay in its place to see if it cures the problem. The HTR relay is the center one at the bottom of the under dash fuse panel. The HTR relay is the same shape as the H-LP/AMT relay, but may have a different color shell. The two are identical though in function, so they can be swapped.
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Old 12-28-2010, 06:12 PM   #15
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Thank you CT. unfortunatly that didn't fix it. And it's the left relay under the dash, because the middle one has five prongs while the other two have four. You are still very helpful. And I wish that fixed it, boo. I was so excited for that to work. What's next? (sigh)
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Old 12-28-2010, 06:18 PM   #16
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What's next? (sigh)
Make your peace with Jesus?

(sorry couldn't resist)
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Old 12-28-2010, 06:23 PM   #17
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Haha.
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Old 12-28-2010, 08:43 PM   #18
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Oh. And now my heater won't work. Grrrrrr
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