Sensors for the key ignition door jar
alarm stays on with key off I'm looking for a fuse or relay I can pull without having to unhook the battery every night I done gave up on fixing it. On its last leg anyways but we still got to have it for a while I just want to know where the relay are fuse is I can pull battery 2 or battery 3. Location 35 and 37 on the fuse box under the hood which one controls the BCM body control module? M brother unhooked speaker to alarm but just because not making noise doesn't mean it's not still going off because it is it runs the battery dead every night

 

Year?

 

The fuse box under the hood and the instrument panel junction block inside the vehicle both have covers that have the fuse and relay layout shown on the inside of the cover. Use that as your guide.

If you wish, you can also purchase a battery quick disconnect to disconnect the ground by rotating a handle 90°.. you just have to make sure there is enough clearance to both attach and operate.

 

2005 Saturn relay. Serious issues the fact that key in ignition ignition sensor all the door ajar sensors. Back door rear door ajar always on. and the beeping noise going down the road my brother unhooked the speaker and wondered why it kept running battery down. Because the speaker u hooked doesn't mean the alarm going off it's still going off just don't hear it now. Think Chevrolet worst mistake. Still got to use it for now . Back door sensors bypassing all of them really and ignition key hell that's even got a hood open sensor. The front door one door I mean I don't know which one it is but no where they are but the rest of the doors I do not

 

Your description is confusing. The title says door lock sensors but the problem you are describing is not that the doors have a locking issue, it's that the vehicle is telling you all of the doors are ajar at the same time anytime you have the key in the ignition.

Is this correct?

Since it is all of them at once, I suspect that the door monitoring system, likely controlled/ monitored by or integrated into the body control module, is not receiving any signals from any of the sensors to indicate door closure.

Guessing that either a power feed to the sensor monitoring circuit is missing, the ground connection for the circuit has been severed, or the response line, if there is a separate one, is open circuit.

Sounds like something a body control module would control. I would look for a good schematic to try to verify the above.

In the meantime, again I recommend the quick disconnect at the negative battery terminal until we figure this out.

 

The diagram for the door lock/latch system shows that everything is controlled by the BCM. Apparently there are sensors in the door latches that sense when the door is latched. I guess the latches could both be replaced, but I'm not sure that would fix the issue. I vote for BCM replacement.

Door lock/latch wiring diagram

 

I was going to reply that it might be possible that a common ground existed for the entire system, but the schematic shows individual physical ground points on the pillars near each of the door plate sensors. This makes sense as the plate sensors are all over the vehicle. Unless all of these grounds somehow linked together via tapping into a single wire harness whose ground has lifted, The BCM would seem to be a prime suspect. I have not gone through an analyzed the ground distribution for this vehicle.

 

Found more extensive diagrams of the 'theft deterrent system' which provides more detail on the door ajar sensors. It looks like power is provided by Fuse 1 (TRUNK/LKS) in the instrument panel fuse block.

Theft deterrent electrical diagram

 

I yield the entire floor to oldmarine