Buzzers and Beepers 3-08-R. Kwas
Electrical notes for installing Beepers and Buzzers
There are very few times that I want my vehicle to nag me with beeps, buzzes, voices, or any other annoying noises (my phone does enough of that already), but one of those times I allow my vehicle to do this is when the engine is running, and has no OIL pressure. On a P1800 for instance, with its Oil Pressure gauge, one wouldn’t know of a loss of oil pressure unless one was looking at the gauge (or maybe hearing unusual noises from the engine compartment, but that’s already too late!)...so on my 1800, I have added a standard oil pressure switch and a beeper. Yes, it does sound off when IGN is ON and before motor is started and running, in the same way that the OIL Indicator lights in a 122 before start-up...but I don’t mind...before start-up is test-time of the on-board sensing and indicating systems.
Another condition which do I authorize my vehicles to nag me about, is lights left ON with engine OFF, because this load is certain to drain the battery within hours and prevent starting. Presented here, is a circuit diagram for the absolute simplest circuit which will do this. It powers the audible indicator of your choice from the Light Switch, and completes the low side circuit to battery negative with a new relay which needs to be added (and which provides an IGN OFF function that is otherwise not available in vintage vehicle systems). This relay is a standard, low-cost “Form “C” type (Bosch No. 0 332 209 150), wired to provide a closed contact, and connection to chassis (only) when IGNition is OFF.
I developed this Ultra-Simple (and low cost) Lights On Reminder Circuit on the request of a 122 owner. Link to Thread: http://www.brickboard.com/RWD/volvo/1266780/120-130/headlight_buzzer.html
It could certainly be used for other vintage Volvo vehicles. The design locates the new relay under the hood where it can be wired to pick up fused IGN power, routes a single control wire through the firewall, and locates the audible indicator under the dash where it can be heard and also simply connected to the lights switch.
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Additional Information... 120-130 1966 |
| posted by
Ron Kwas on Mon Mar 24 17:46 CST 2008
last visit: Sat Mar 29 07:04 CST 2008
|
| ...the circuit shown is
actually different from the earlier verbal explanation (so
disregard!)...after thinking about it, I changed it a bit and made it as
simple as possible, locating relay under the hood, powered by the Fuse 2
circuit (or Fuse 1 if there is an empty terminal available), and
included a single wire routed through the firewall, to the beeper/buzzer
located under the dash somewhere...the standard BOSCH form C relay
(inexpensively available, with a Normally Open NO and a Normally Closed
NC contact) is powered when IGN is ON. At that time, ground is removed
from Neg side of beeper, so if lights are turned ON, beeper will not
sound. With IGN OFF, low side circuit of beeper is completed to chassis,
so if lights are also turned ON, power is supplied to beeper high side
and it will sound...simple! Use in conjunction with 122 wiring diargam: http://www.sw-em.com/122S%20Wiring%20Diagram.jpg Cheers |
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Things I don’t wish to be nagged about
include...an open door...I KNOW, I opened it!...and the fact that I haven’t put
on a seat belt...I’ll be in charge of when I use them and when not...beep your
a** 
!
Contents of this article are In-Te-Lab / SwEm Copyright © 2008. You are welcome to use the information at your own risk and for non-commercial purposes, but if you copy the information and pass it along without giving credit to the author or linking back to the SwEm site as the source, you’re just a lazy, scum sucking plagiarist...go come up with your own damn idea!
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