Headlight warning chime

If there is one thing that bugs me about the key-in buzzer in an A-Body is the fact that it buzzes even when the car is running and the door is open. But what I want even more is for a warning if I turn the car off with the headlights on.

About 4.5 years ago someone asked the question about if a chime could be used to replace the key-in buzzer used in A-Bodies:

Key buzzer to chime

This question prompted me to look into this some, leading me to discover that certain years of Ram trucks used a chime module that also covered the seat-belt and headlight warning sound.

Below is a clip from a '95 Ram service manual. Here is a link to a thread about removing the buzzer/chime - Want to get rid of that annoying door/key/light buzzer? look here :) - Dodge Cummins Diesel Forum (hope the pictures show up).

Note that in the above thread the 95, 97-98 Ram used a chime, but the 96 used a buzzer. FYI

capture-jpg.jpg

Here is a link to a chime with the same numbers as the one I grabbed. Looks like they were used in GM vehicles as well as Jeeps, so they should be easy to find.

Based on my ’74 Duster wire diagram, the buzzer receives power and is grounded via the seatbelt interlock and/or door switch when the key is in the ignition.

This means that in order to wire in a chime from a Ram and make it function, it appears that the following would need to happen:

1. Current power (red wire) to the buzzer will need to be moved to the chime (spade #7).
2. The ground (black wire) that runs through the key-in switch and door switch needs to be moved to the chime (spade #6).
3. A ground wire from spade #3 needs to be added.​

The above would recreate the current functionality with a chime rather than a buzzer.

For the additional functionality (headlight warning) that I want, the below would be added:

1. Chime when headlights are on:

a. Add a second ground to spade #6 (key-in switch above) that grounds when the headlights are on.​

2. Turn the chime off when the car is running:

a. Add a hot wire from the blue ignition wire to spade #1.​

The above additional functionality would need to go hand in hand or the chime would happen any time the headlights are on which would make driving at night a bear. By telling the module that the car is running by feeding it power off the ignition circuit, it should silence the chime both when the door is open and when the headlights are on and the car is running.

The missing piece of the puzzle was how to tell the module the headlights are on.

This was where I left it 4.5 years ago.