Tricking an electrical circuit

Tricking an electrical circuit - Printable Version

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Tricking an electrical circuit - biotechee - 03-21-2005

Alright- although this does not pertain to my 968 (sorry!), I have a question for the electrical gurus....

I have a seatbelt circuit that beeps until I engage the buckle. Mind you, I drive with my seatbelt all the time, but this beep is active for a significant amount of time as soon as you turn the key. Annoying to say the least. It is also a pain when working on the car with the ignition in the "on" position. I would like to "trick" the circuit into thinking the belt is always connected. Can I merely connect the two leads from the belt recepticle, or do I need to use some sort of resistor (similar to tricking the airbag on the 968)? If I need to use a resistor, any recommendation on the rating (Ohms, watts)?

Thanks in advance!

Tricking an electrical circuit - rustech - 03-21-2005

[quote name='biotechee' date='Mar 21 2005, 10:55 AM']Alright- although this does not pertain to my 968 (sorry!), I have a question for the electrical gurus....

I have a seatbelt circuit that beeps until I engage the buckle. Mind you, I drive with my seatbelt all the time, but this beep is active for a significant amount of time as soon as you turn the key. Annoying to say the least. It is also a pain when working on the car with the ignition in the "on" position. I would like to "trick" the circuit into thinking the belt is always connected. Can I merely connect the two leads from the belt recepticle, or do I need to use some sort of resistor (similar to tricking the airbag on the 968)? If I need to use a resistor, any recommendation on the rating (Ohms, watts)?

Thanks in advance!

[right][post="2150"]<{POST_SNAPBACK}>[/post][/right][/quote]

First off, it's there for your and others safety and I don't recommend disconnecting it. When working on the car, you can always just plug your seatbelt in.

Most likely, since the belt receptical is not grounded, it requires one ground wire, and one sensor wire (you should take a voltmeter to them to make sure they're not positive -- can't imagine they would be). Connecting the two is how to disable it permanently.

Tricking an electrical circuit - biotechee - 03-21-2005

Rustech-

I do not intend to not use my seatbelt. I merely want to disable the audible alarm. I used to never wear my belt- ever. Now, with a 3+ year old to set an example for, I always wear it no matter what. That will not change.

I will check the contacts with my meter and go from there.... Thank you for the info- I appreciate the help!

Coincidentally, I had an old 200SX which had the voice in the car.... "Lights are on".... It was cool for a week, then I wanted to strangle to computer!

Tricking an electrical circuit - rustech - 03-21-2005

I have disconnected a door chime before in much the same way for the same reasons. Some things are just annoying.

I guess my point is, is that some people trying to break old habits rely on these things to help them. If no one else drives your vehicle, then I don't see an issue.

Side note: On newer Ford vehicles, the chime comes on every minute for like the first 5 minutes unless you put your belt on. My 22 brother can't get it through his head to wear his seatbelt (thinks it's not cool). I've been trying to convince him that when he hears the annoying chime, to put his f#*%ing belt on (Using Ivan Pavlovs technique here). He used to remark that he was just going to disable it. 3 months ago, he totalled his F-150 with only an airbag to save his ass. Some suicidal mentals need all the help they can get.

Tricking an electrical circuit - Greimann - 03-21-2005

I would guess you can just tie the two wires together to simulate the latch being engaged. There is no real diagnostic going on like the airbag ignitor resistance value. It is either a yea or nay connection.

Tricking an electrical circuit - james taylor - 03-21-2005

Depending on the make/model -some manufacturers have a sensor in the seat also that depicts someone is in the car. More than the buckle may be involved.

Tricking an electrical circuit - rustech - 03-22-2005

The seat sensor is usually for airbag deployment. If no one is in the seat, it deactivates it in the incident there is an accident to save on repair costs. It really wouldn't have anything to do with the seatbelt sensor for the ringer but if it sensed a driver, then it would still need to sense the belt pluged in.

Tricking an electrical circuit - biotechee - 03-22-2005

Rustech,

Tell your brother he is lucky. Mine wasn't. Older car, no airbag, not wearing the belt. DOA due to head trauma.

I was also in an accident where I wasn't wearing my belt- in highschool- got in the front seat of a 280Z. We were hit by a dump truck. My buddy who was driving was in the hospital for over a week and had to have arthroscopic knee surgery because the wood steering wheel decided to kiss his knees. His girlfriend was pinned in the back hatch and had to be removed with the jaws of life. She was in the hospital for about 2 weeks and had some damage to her spine. I kissed the windshield and the dash board with my face, and my knees were slammed into the bottom of the dash. I was released that night. None of us were wearing belts. We pulled out into traffic and the dump truck ran a yellow/red light and nearly t-boned us. My friend saw the truck and stepped on the gas, as a result, the truck only clipped the rear quarter. If he had not stepped on the gas, the truck would have hit directly in the side and we would all be permanently disabled or dead. The truck ended up on it's side a hundred yards away. There were no skid marks prior to the impact.

Tricking an electrical circuit - rustech - 03-22-2005

Sorry to hear about your brother. <img src="/forum/images/smilies/968/sad.gif" class="smilie" alt="" />

Regarding the dump truck accident, did they ever find out what the driver was thinking? Under the influence? If he went through on the yellow/red, does this mean your friend went through on the red?

My brother is very fortunate. Only damage was to his hand, and the fact that the airbag knocked him out for a minute. I've told him he was lucky time and time, unfortunately, I don't think he has learned as much from it as he should have. I'm sure time will tell.

Tricking an electrical circuit - gryphon - 03-22-2005

Well, I don't know what type of vehicle you referring to, but I'd assume that you could simply unplug the buzzer which is probably located in the vicinity of the fuses.

Tricking an electrical circuit - rustech - 03-22-2005

[quote name='gryphon' date='Mar 22 2005, 02:13 PM']Well, I don't know what type of vehicle you referring to, but I'd assume that you could simply unplug the buzzer which is probably located in the vicinity of the fuses.

[right][post="2210"]<{POST_SNAPBACK}>[/post][/right][/quote]

It would work, only problem would be that you would be disabling it for the "Open Door" and "Lights" at the same time. Another issue to some might be that the on dash seat belt light would remain lit.

Tricking an electrical circuit - biotechee - 03-22-2005

Well, I will try the seat location first as it is easier to get to....

If all else fails, I'll just deal with it. The car I am talking about is a Jetta. I like the buzzer/chime idea, but I definitely want it to work for the other things like lights and such.

Rustech- thanks for the thoughts. I appreciate it- glad to hear your brother is okay. In some ways, I still refuse to grow up (unfortunately my scalp decided otherwise!!!!!).

Tricking an electrical circuit - Eric_K - 03-22-2005

The 968 has a seperate plug under the seat for the seat belt light. It actually works opposite from what you would think. Unplug the plug and the dash light goes out. Maybe Jetta has a similar setup?

Eric