1998 Volvo V90/960 Alarm Siren Module Location

[crispyAZ]

As the subject states I have that model of Volvo and have come across that issue where I believe that NiCad battery failed leaking over the circuit board of the alarm siren module causing it to randomly go off throughout the day.

From what I have read that siren is in the right wheel well and I have taken off the plastic liner before and didn't see the siren. Am I just not looking good enough and missed it? Also can you simply disconnect it and resolve the issue of the flaky alarm? I don't drive this car very often and the alarm issue drains the battery before the next trip so I would like to just kill the issue rather than charge the battery semi-regularly.

Thanks in advance for any pointers in the right direction.

[snowyfroze]

As the subject states I have that model of Volvo and have come across that issue where I believe that NiCad battery failed leaking over the circuit board of the alarm siren module causing it to randomly go off throughout the day.

From what I have read that siren is in the right wheel well and I have taken off the plastic liner before and didn't see the siren. Am I just not looking good enough and missed it? Also can you simply disconnect it and resolve the issue of the flaky alarm? I don't drive this car very often and the alarm issue drains the battery before the next trip so I would like to just kill the issue rather than charge the battery semi-regularly.

Thanks in advance for any pointers in the right direction.

I have had the same problem with my 1993 Volvo 240 and my mechanic finally put one of his own good working ones in my car and gave me three months to find my own and so far I’ve only found one that I hope works. I hope you've found one by now! I never thought finding parts for my car would be this hard especially for a mass airflow sensor, but it’s been two years of failing ones because I was buying remanufactured ones or mass flow sensors with the single rectangular prong that doesn’t work.

[crispyAZ]

As the subject states I have that model of Volvo and have come across that issue where I believe that NiCad battery failed leaking over the circuit board of the alarm siren module causing it to randomly go off throughout the day.

From what I have read that siren is in the right wheel well and I have taken off the plastic liner before and didn't see the siren. Am I just not looking good enough and missed it? Also can you simply disconnect it and resolve the issue of the flaky alarm? I don't drive this car very often and the alarm issue drains the battery before the next trip so I would like to just kill the issue rather than charge the battery semi-regularly.

Thanks in advance for any pointers in the right direction.

I have had the same problem with my 1993 Volvo 240 and my mechanic finally put one of his own good working ones in my car and gave me three months to find my own and so far I’ve only found one that I hope works. I hope you've found one by now! I never thought finding parts for my car would be this hard especially for a mass airflow sensor, but it’s been two years of failing ones because I was buying remanufactured ones or mass flow sensors with the single rectangular prong that doesn’t work.

Sorry missed this, very rarely on here browsing.

I have yet to find one but the first issue for me is actually finding where it is located, can't replace until I know where it is located after all. I have seen guides on people cracking the bad one open to repair the battery assuming the circuits aren't destroyed. Maybe I need to look again and dig deeper into the wheel well.

[packetfire]

Try looking in the DRIVER's side wing, near the turn indicator, so remove the wheel well on the OTHER side. I remember this for 1996, not sure if it stayed there for 1998.

[crispyAZ]

What I am looking for is this box (in red) that according to these diagrams appears near the front of the car. I just removed the plastic liner on the driver's side front wheel and didn't see anything like it there.

[crispyAZ]

Been a while since I have been here but came back to report what I ended up finding out to maybe save others the trouble later.

So it turns out I was chasing down the problem wrong. Initial searches online had me thinking the battery was the issue and after poking around I ended up seeing that there was no battery present. Some more digging ended up leading me to the real issue.

I read that it could be a general alarm fault and found the LED codes. Turns out when the alarm is armed it should immediately start blinking but in my case it stayed solid for a few seconds and then went into blinking mode. From what I read that meant likely a sensor fault. I looked at where the sensors were and the likely culprit was the hood sensor since I had driven into a hole at one point that caused some pretty extensive damage that got repaired.

To test I pressed that sensor switch down to mimic the hood being properly closed and the alarm LED went immediately into blinking mode. For the first time in years things looked right. On the actual hood there is a piece of sheet metal that presses that sensor into position when closed and I simply bent it a little bit. That solved it completely. No more random alarms going off and draining battery as well no more needing to leave it on a charger between drives.

Thanks all.