What is causing the battery parasitic draw?

Hello, well you have narrowed it down quite a bit already. I'll post the list of components in service info on that circuit. The daytime running lights should have a relay which I'll find for you, do you have a moon(sun) roof? There is also this Ignition Key Cylinder light, not sure if you have that or not. And then the Combination Meter (Cluster) looks to be on that circuit as well, probably for back lighting.

Okay, even though these are aftermarket wiring diagrams, they do show a control module for the Daytime running lights, which is most likely going to be the draw. Since it's on a Hot at all times power feed through the Dome fuse. It's behind and above the glove box, so if you take the glove box out you should be able to see. Just unplug it and make sure your headlights and tail, etc., still work okay.

The DRL Relay is not on the Dome Fuse circuit, but this control module is. You can try pulling the DRL Fuse and Relay and see if the draw drops off, but it may not, and another concern would be that the Brake Indicator and High Beam indicator don't work anymore with the DRL module unplugged, It looks like the module controls the Ground for the Brake Indicator and the power for the High Beam Indicator on the Cluster.

The Dome Fuse feeds it might be for some kind of memory since it's a constant feed.

No moonroof and no light in ignition key cylinder. It’s the most basic of basic Corollas. Surprisingly, it has the Theft System. Not sure if it’s aftermarket. But either way. That’s been disconnected years ago. I will check on the DRLS right now and see what that does. I only disconnect the black relay box, correct? Or are there other things?

Refresh this page, I posted some additional info in my last post.

I would also check that you still have a High Beam indicator on the Cluster after unplugging the module, the Brake Indicator too is controlled by the module it looks like. The OEM shows that's its pretty integrated. It controls quite a few circuits. Maybe find a used one if possible if you lose anything on the Cluster with the module unplugged.

These are the OEM diagrams of the DRL control module.

The 5th diagram is the Dome Fuse to Cluster for the Door Indicator and the Ambient Temperature Display, so those are on that fuse as well.

The DRLs relay did not drop the amperage. The two cluster indicators did in fact go out with the relay but as mentioned. Doesn’t seem to be the issue as it remained at 0.25A.

Okay, so you're still at 250ma. Let's see what else could be on that circuit
Did the Ambient Temp display go out with the DRL relay disconnected too?

Excuse the ignorance. What’s that?

There's supposed to be an outside temperature display on the Cluster, your vehicle may not have it, or it may be burned out. This is the Cluster Temperature display and Door indicator, same power feed but different circuits inside the Cluster.

Oh, no, definitely doesn’t. I don’t have a tachometer.

Okay, I'm not seeing much else, except this Integration Relay, which I believe is built into the Instrument Panel J/B (fuse panel) driver side dash. It activates the door lamps and seat belt indicator, etc. You may be able to unplug the connector that comes from the Dome Fuse, That blue/yellow wire, I'll see what connector it is, probably on the back of that fuse panel.

This wire needs to be blue with a yellow stripe though, at pin 4 of this connector, the other diagram is a bit different for some reason. This wire comes from the engine room fuse panel, into the Driver Side J/B on pin A4 and then back out on E10, to the Center J/B. But the aftermarket diagrams are not always correct. So just check the back of the driver side fuse panel for this connector 1A and pin 4 being the Blue/Yellow wire.

You can see in the 2nd diagram it looks different.
Here is the Integration Relay Location.

Okay, here is its exact location, they have multiple boxes on the driver side, but the Integration Relay is on the back side of that driver side fuse panel, 2nd diagram labelled C.

What are you using to measure current flow? If it's an amp clamp you could check each wire right at the back of that fuse panel and see which wire the draw is actually on. And trace it down that way

It looks like the Integration Relay is also the Door Lock Relay. Service info also mentions "Key Off Power window signal".

I am definitely not getting that integration relay soon. It’s a really tight fit. And no. Not an amp clamp. I would have to get another person for that relay. Or check the wires. Whichever comes first. Would it be a problem to have the fuse disconnected for some time until it gets figured out? I saw somewhere that it messes with the alternator and doesn’t charge the battery. It mainly only affects the radio. The door indicator, dome light and DRLS is not an issue. Also. Could it have just been a bad battery? It was the Walmart brand. But the previous one lasted nearly four years. And everything was the same.

It looks like the Integration Relay is in series somehow with the Gauge Fuse which goes to the Alternator IG feed. Which I would think is an ignition feed to the Alternators voltage regulator. So, you could keep the fuse out, and put it in when you drive, I know that sounds like a huge pain.

You can also check the fuses in that driver side fuse panel for voltage drop, if you trip the door switches so the interior lights go off, that way there isn't current flowing due to the door switch and then check for any millivolt voltage drop, If there is voltage drop across a fuse there is current flowing on that fuse.
It's the method used now instead of taking fuses out, because on more modern vehicles pulling fuses wakes up networks and modules causing normal current draw.
But check the fuses on the interior fuse panel, and if you find any, you will because you have a 250ma draw.

You can figure out where the current is going from the interior fuse panel, since you have already figured out that's its originating from the Dome fuse in the engine fuse panel.
The voltage drop across fuses will be in the very low mv range, but that's how we're finding parasitic draws these days. You may even try unplugging the Alternator itself.
Maybe that Integration relay is staying on, I don't see any diagrams of its internal function. But try measuring voltage drop, set your meter on mv, or auto range if it has it. And let's see what you find. and Ill check back with you a little later.

All the fuses read 0.0 in the instrument panel. I believe i was testing them right. Some even started at like 0.2 and dropped to 0.0 quickly. The Dome fuse in the engine compartment read 1.1 when I tested it before. Would it be bad to leave the fuse on and just let the alternator charge what the fuse drained when using the car? The car is used a minimum of twice a day for a total of 20 minutes. When it had the old battery, it was drained after 3 days of it sitting there. It happened twice. But prior to. The car was used every day. The second time it just completely killed it. (In three months). I left the fuse on right now. The battery voltage is 12.6. If it does happen to drain it. What is the point of concern when it comes to low voltage?

Well, you don't want the battery to be constantly drained. Even getting down to 11-volts is going to prematurely damage the battery. And you have to drive long enough for the Alternator to fully recharge the battery too. The Alternator has to run the vehicle and also charge the battery at the same time. Short trips can be an issue in that regard. But having a 250ma draw, that's a 1/4 of an amp. The vehicle should be down below 50ma at min. I like to see them down to about 20ma if possible (0.020A). Batteries that drop below 12.4v will greatly shorten the life.
So, if you measured 1.1volts of voltage drop on that 15Amp fuse (the Dome fuse) that's just about 230ma of current flow on that fuse. 1.2v of voltage drop would be 250ma on a 15Amp fuse.
Did you try unhooking the alternator to see if the draw stops? Thats something to check as well.
Which fuses did you have 0.2v on? and what rating was the fuse? The rating of the fuse is taken into the calculation for Ohms Law when measuring voltage drop. A 10Amp fuse with 0.2volts on it compared to a 15Amp fuse is about twice the current flow. (10Amp would be around 26ma and a 15Amp fuse would be around 42ma.
At something like 250ma, that almost seems like a relay is staying on.

Seems like putting the fuse on and off is the only option then. Until i take it somewhere. I am nowhere near a novice mechanic. Just like doing things on my own. I have not unhooked the alternator. How would i do that? Disconnect the signal? The power? Ground? What readings would I check for? A parasitic draw test with the alternator unhooked. I did not see what fuse it was. But possibly a 15 amp. It wasn’t a constant read. It was 0.2 when I attached the probes and in less than a second it dropped to 0.0.

How are you testing the current draw? you have a multimeter in series with one of the battery cables, correct? And are you testing with the driver's door open?

Yes. That’s how. Door not closed but with the sensor pushed in.

Okay, if you already have a battery cable unhooked, just disconnect the battery cable so you can unbolt the main positive cable on the Alternator and isolate it so it doesn't short out on anything, Unplug the connector on the Alternator too and recheck for the draw. If it's still there just hook the alternator back up. This is just to verify it's not a drain through the Alternator.
Are you able to unplug any of the connectors on the front of the Instrument Panel JB?

These are the OEM diagrams for the Dome Fuse. Does the buzzer still work if the head lights are left on when the key is off? The buzzer works through the Integration Relay as well.

Okay. So, keep the negative cable disconnected. Unbolt the power/positive cable from alternator. Unplug the signal cable from alternator. And repeat the draw test. Check for drainage in Amps. I don’t remember if the buzzer still works. Probably not because I believe the buzzer goes off when the door is opened.

Yes, although it looks like almost everything dealing with the Dome Fuse is related to this Integration Relay. There's a Hood switch as well, it goes to the Theft Deterrent ECU, but that's unplugged you mentioned. I'm just looking for anything on the Dome Fuse, I added a couple OEM diagrams to my last post.
There are multiple door lock motors one for each door, that of course go to the Integration Relay, they can be difficult to diagnose since they're a pain to disconnect.

There are no door lock motors. Everything is manual. It’s the basic of basics Corolla. Nearly no accessories and no electrical components. I think everything will come down to the alternator test and the removal of that relay. Is it an issue if I unplug the negative cable every time the car is stationary instead of the fuse? Find it easier to bolt and unbolt with a wrench than take off the fuse as sometimes it gets tricky to remove.

The issue with disconnecting the battery is the PCM/ECM losing its learned memory and Readiness Monitors that are the PCMs self-tests on such systems as the Evap leak, Catalyst monitors, etc. It's not so much of a big deal temporarily while we figure out where this draw is happening. But if you need to go through emissions testing/inspection anytime soon that will be an issue.
It looks like that Integration Relay is probably built into that fuse panel, and on the back side is just the harness plug for it where the power will come in or go out to whatever its controlling.
It's difficult to tell everything that it controls, I'm having to look at almost every diagram to see if it's included or not. The manufacturer should have just made a diagram for the relay itself showing everything on one page that has to do with it. The circuit for the Dome Fuse also looks to run into that Instrument fuse panel and then back out to another Junction Block in the center of the dash and then come back to the Fuse panel.
So, I think when you get to the relays connector on the back side of the fuse panel, is to disconnect it and if possible use your meter to check each pin on that connector to the fuse panel (in series) like you're doing at the battery, but this way we would be able to know exactly which wire to the relay the draw is on. If that makes sense.
You may want to invest in an amp clamp that can measure DC current, even a cheap one since you're not measuring high current flow in cases like this.
You would be able to just put the amp clamp around each wire at the fuse panel and see if there's current flowing without having to deal with disconnecting anything to put a meter in series with wires.
I'm surprised you didn't find any voltage drop across any fuses in the instrument fuse panel. I'll need to check where else that circuit goes, you don't hear anything buzzing or clicking under the hood when you reconnect the battery at all? Do you have your meter on the negative or positive battery cable?

I might lose power here with this big storm coming in, so if I don't respond that's why.
Try pulling these fuses. And the relays in the engine compartment fuse panel, just to see what happens.
With this vehicle not having all the bells and whistles, this draw should not be this difficult to find. I'm looking at the Cluster right now, and it's on the Integration Relay as well, I'm not sure how difficult it is to pull the cluster, to unplug it. With no door lock motors, do you not have power windows either?

I appreciate the help. I am not able to do anything more to the car. I won’t see it again until next month. The user of the car says they will just disconnect the battery every night and connect it on its first use of the day. I told them to be checking the battery voltage constantly to see if they should disconnect it more often than just at night. That’s until i get back next month and figure out that integration relay. No, no power or anything really. The only voltage drop i saw was that 1.0 of the Dome fuse. No, no buzzing or clicking. Never tried to pay attention to it. But now when I am. There’s no sound. Meter always on negative.

Okay, it doesn't matter which side of the battery you put a meter in series to measure current flow, it's just easier on the negative cable because it ensures you are getting all the current flow through the one cable, where the positive can have multiple cables. So it may be that the draw is either not going passed the Integration relay and that's why you're not seeing any voltage drop on the fuses for the interior fuse panel, or the Dome fuse circuit is branching off to somewhere in the engine compartment. I finally found these charts that show everything on the Dome fuse, but we've gone over most of this except whatever is on that relay. It seems to be the last thing besides the Cluster and Theft ECU.