I am having an issue with the movement alarm on a machine. It stays on all of the time, even when the key is off. When there is no movement, the sound is very faint, but it is still there. When the machine is moving, the alarm works correctly - with the correct volume as well. I did notice that when the Access 2 module is unplugged, the sound goes away. Any ideas?
Showing items 1 - 9 of 9 results.
Nope. Still not fixed. Replacing the alarm did not help. The resistor is intact, and it is the movement alarm on mine that is beeping. The only other thing I have found is that the beeping stops when either Access 2 or 3 are disconnected, and the strobe light is broken. Customer wants to hold off spending anymore time on it at the moment.
I do kinda of deserve the shellacking Karma gave me about this, I guess. I got 4 trucks pretty much like this all with a very close problem. We pulled the batteries and cleaned as much of the solid buildup of corrosion out from under and around the battery compartment, as much as we could and after that, we noticed a 'chirp' but not from the motion alarm, ours came from a peizo buzzer on the distribution card. I noticed some crud had gotten between the pins on one of the cards, and we cleaned it with an old toothbrush and that one went away. the others went away after about a week of drying out inside the warm shop with the batteries disconnected (I did not get around to checking them or anything, it was just the next time I got time to look at them they had stopped). I spent about 10 hours looking into the circuits on the only 1 I got to "fix". I think it may have been from the low pressure water that was used to rinse out under the battery box.
I hope the OP got his fixed by now.
check the resistor that is supposed to be accross the teminals on the alarm. it gets broken alot on the S model trucks and will cause the faint chirp from touching frame and from just being broken
manager card = access123 logic card (i'm assuming this is what the truck manager card is)
Dean - You replaced the Access 2 module (Not 1 or 3)? Good to know that did not solve it.
Swoop - I will give that a shot. I did check it with a meter and saw pulsing voltage, so I don't have high hopes. What do you mean by a "manager card"?
Some more information I found when I was there yesterday...
CA404 Pin 6 on the Access 2 module is the Travel Alarm Output and I am seeing a pulsing voltage on this pin. I suspect this is why the volume is so low. If it was solid voltage, it would be louder.
When CA405 is unplugged, the alarm continues. As soon as I unplug CA404, the alarm shuts off. So this should mean that the problem is not in the CA405 harness. Time to look more at the CA404 harness. 12 of them are outputs, so that leaves me 7 more pins to check....
take one of the working alarms off of the other 2 units and hook it to this one and see if the problem persists.
If the problem goes away then put a new alarm on it, the one that is on it is bad.
If the problem still occurs with the other alarm hooked to it then the problem is in the circuit not the alarm itself and you should start looking for bad grounds or possibly a bad manager card since it controls the signal output for the alarm.
I have the same problem, the alarm chirps away faintly, even with key off, changed accesses also, but customer ok with it.
How nice of you to assume that the alarm was rigged in. It came on the machine from Crown. It is a movement alarm, not a backup alarm and it works that way. There are also two other machines that are identical and they work fine. This is programed into the access123, just like it is supposed to be.
disconnect the rigged in wiring for the backup alarm, and wire in the backup alarm, using the crown recommended alarm, wired in the way Crown would do it, and have it programmed to work through the access123, or try adding a diode (10d6) inline with your "motion alarm".
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