blowing dome light fuse cause other problems?

[kaffakid]

I'm working with a 2000 Camry CE.

I was replacing the dome light last night with an LED bulb. Not knowing it was the wrong size, I jammed a 39mm bulb where a 31mm bulb was supposed to be. That caused the dome light fuse to blow (7.5A fuse). That made the auto doors not work as well as the front dome/map/ceiling light. I replaced the dome light fuse. The auto doors went back to working as well as the front map light. I realized my mistake and placed a 31mm bulb back in the dome light assembly. I started messing with the bulb itself to get it to sit right and the the dome fuse blew again. I replaced the 7.5 dome fuse again. I did this whole charade over a total of three times -- I blew 3 dome light fuses in a row by fiddling with the bulb.

The previous three times, I had been messing with the bulb with the fuse IN. On the 4th try, I kept the fuse out, situated the dome light bulb correctly, and then replaced the fuse. The bulb lit up, but stayed on and wouldn't shut off. I figured, maybe the switch on the dome light assembly was messing up because it "slides" (not clicks) in between the settings (ON - OFF - DOOR). At this point, I wasn't going to mess with it anymore. Since the auto doors and front map light were working I figured I'd just find a new dome assembly. I unscrewed the dome light assembly from the ceiling and took it out. I found one on FleaBay and it's in the mail. http://www.ebay.com/itm/330852377845...84.m1439.l2649


NOW HERE IS THE real question.

During the day: I will start with my headlight switch in the middle ("automatic lights" position). When I turn the headlight switch to the "off" position my daytime running lights won't turn off.

Same thing during the night: I will start with my headlight switch in the middle ("automatic lights" position). When I turn the headlight switch to the "off" position, the headlights lights won't turn off.

Last night, I turned the ignition off, leaving the headlight switch in the middle ("automatic lights" position), and the front and back turn signals on both sides just stayed on solid. They went off when I turned the headlight switch to the off position. The car isn't doing that today.



Could this headlight switch electrical problem have anything to do with blowing the dome fuse THREE times in a row?



If this post is hard to follow please let me know. Thanks in advance for you help.

[dc_98_cam]

... Just guessing here ...
The dome fuse powers the Daylight Running Light Relay (main).
Maybe when the dome fuse blew out, the DRLR was damaged.
I would try to get a salvage yard part to confirm that this is the actual cause of your problem.

Is there anything else that is not working? Is there anything that looks unusual?

[kaffakid]

Thanks so much for the reply!

Nothing else seems to be off. A/C works. Mirrors work. The stereo head unit lights are normal brightness, as well as the gauges. Windows work. Turn signals blink fine. Glove box light works (only when key's in the ignition -- never checked that before). I haven't had someone get behind the car to verify the brake lights.


I forgot to mention:

Last night, when the front/back turn signals on both sides stayed solid (with the headlight switch in "middle" auto lights position, AND ignition off), ---> the stereo backlight and buttons, the A/C gauges, the cigarette O-light, and the gauges above the wheel stayed on as well. Again, when I moved the headlight switch to the OFF position, everything turned off (turn signals and interior lights just mentioned).

Is the DRLR in the fuse box? I guess so?

[dc_98_cam]

The part labeled D6 is the Daylight Running Light Relay (main).
It looks like it is just to the left of the center console, under the dash panel.
If there is a knee bolster panel beneath the dash. You can remove that and take a look.

Here is the service manual location diagram ... part D6:

[kaffakid]

Thanks so much for the help!!

[dc_98_cam]

There is one other relay that might be involved ... integration relay.
However, since the DLRL is directly connected to the dome fuse, which blew out, that might be the best thing to look at first.

I don't really know if you can find a used DLRL easily here in TX ...

[kaffakid]

I replaced the Headlamp relay today. I'll continue to keep an eye on the DTRLs until the new Dome assembly comes and then put everything together, see what happens, and post a followup.

Question:

On a stock/unmodified 2000 Camry CE, are the yellow DTRLs always supposed to be on with the white DTRLs?

To take that a step further, are the yellow DTRLs always supposed to be on when it becomes twilight and the Headlamps go on?

Basically when do the yellow DTRLs turn off?

One more Q: Are the yellow DTRLs governed by the same DTRL Relay that we're talking about?

again thank you so much

[dc_98_cam]

I noticed that the wiring diagram showed an automatic light control circuit for one of the headlights ...
I will have to go back and take a closer look.

[dc_98_cam]

I was trying to see what you were talking about ... yellow DTRLs ... The '99 wiring diagram version does not appear to have separate headlight bulbs. The '99 version diagram shows a dual filament bulb for the left and right headlight. During the day, a current reducing resistor is activated, so that the DLRL headlight filaments operate at a reduced intensity, and then return to full intensity, after dark.

Does it appear that the design was changed for your car ... so that you have a separate yellow headlight bulb, intended for the DTRL purpose?

[Silent Runner]

Been there, done that.....

Sadly, you have blown your Integration Relay.

Although you were doing a slightly different installation, you ended up screwing up the same thing I did.

You will have to remove the fuse panel by your left knee to find this roughly 2"x2", plug in unit labeled "Integration Relay", and look at the very specific part number for it.

This will fix all the stuff you have described.

[dc_98_cam]

^ +1
That makes sense ... the integration relay is also powered by the 7.5 A dome fuse.

[kaffakid]

UPDATE:

Ok so I got a new dome light assembly, put an LED bulb in there, and it's working fine.... I didn't blow the dome fuse this time, so I'm assuming the dome light issue is over with (maybe?).

Thinking that I had created an issue with the headlamps/DTRLs, I had replaced the headlamp relay with one from Autozone approx 1 week ago. I pulled it and checked the plug tonight. It looked like this:



That didn't look good. So I got the original headlamp relay out and put it back in. It's the maroon one on the left.



I'll observe it tomorrow and see if DTRLs are still having an issue.

Is the replacement headlamp relay doing something bad to make the plug look all brown like that?

[Silent Runner]

I've mentioned this in a past post, but maybe I should be more specific about the issue I faced and I think you are running into. Although our wiring systems differ in several ways, much is tied together in its operation, by the Integration Relay.

In my case, by messing around with the dome light, and blowing the dome fuse several times, I ended up blowing the Integration Relay. This affected the auto (interior) dimming feature, as well as some of the outside running light behaviors.

You may have gotten away with not blowing the auto dimming interior circuit, but roasted another part of the Integration Relay.

[kaffakid]

Ok then that's what I'm going to do. Is the integration relay located in that fuse box behind the "change drawer" by the drivers left knee?


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[Silent Runner]

Ya, thats were it is. You may have to remove some additional screws to gain access, behind the main fuse panel. This part, as the name suggests, actually works to integrate all the different features the car has. Lighting, alarms, locks, remote operation and maybe other stuff too. It is something to tip-toe and carefully deal with when making electrical/custom changes to the Camry. You can get away with a bit on fuses, but they are no guarantee that you wont burn it out, after a couple or more mess-ups.