My '91 Civic has recently developed a most annoying problem with the seat belt alarm. With increasing frequency these days it will turn on and stay on for anywhere from a short blip to the 25 minutes it takes for me to get to work. It's somewhat random, too, as if there's a loose or worn wire somewhere.

I discovered that there is a slow beep for when the auto shoulder strap is disconnected and a fast beep that seems to be related to whether the auto positioner is "closed". This one is the fast beep, for the driver side only.

It turns off when I open the door and on after a 15 second delay when the door and shoulder strap locks closed.

I have not found any helpful wiring diagrams in the few books I have found so far, so I though I would ask here before I tear up the interior if anyone can suggest a place to start looking for the problem.

Thanks

 

That would be annoying. I would start by checking the fuses first. Then look under the driver's seat.

Specific to your make and model, I found a part's diagram on AutoZone's site. On the left side of the page, go to "Repair Info" > "Vehicle Repair Guides" > Body > Interior > Seat Belt Systems. It pictures it but doesn't label it. When you look at the diagrams see that snake-looking wire coming off the lower half of the seat belt? I'm sure that's what you want to look at.

Below is a direct link (hopefully):
http://www.autozone.com/addVehicleId...00c15280061eea

While replacing the lower half of both seat belts in a Toyota Tercel, I cames across the sensor for the seat belt "reminder ". One half of it is connected to the buckle (driver side lower seat belt). The other half of it was located under the driver's seat. From what I was able to tell, it would pick up on the tension of the seat belts being clicked in. It snapped apart easily enough. The new buckle had this same part, so that's how I learned this.

I had to remove the driver's seat. Removing the seat wasn't as bad as I thought. 4 bolts (14 mm IIRC). I did have to get the seat belt from the dealer. Shop around if there's more than one dealer in town. Dealer A tried to sell me the entire seat belt "because that's the way they come" for $100. Dealer B sold me the buckle for $20!

 

Thanks for the info. It looks like exactly what I was after. I hope I have some time this weekend to check it out.