Key buzzer to chime
I don’t have it locked down, but it does look easy to add the Ram chime.
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 wiring 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.
If additional functionality was desired, the below could be added:
1. Chime when headlights are on, and door is open:
a. Add a second ground to spade #6 (key-in switch above) that grounds when the headlights are on and door is open.
2. Turn the chime off when the car is running and door is opened:
a. Add a hot wire from the blue ignition wire to spade #1.
The above ignores the brown wire running to the seatbelt interlock since ’74 is the only year it would exist, but in my case, it might make a convenient place to add the headlight ground.
Not really sure how the headlight ground would be wired in. It appears the Ram headlight switch includes a ground switch, but the wiring diagram I have for my Duster doesn’t show the headlight switch including anything like that. Maybe a NO relay off the gauge lights that closes when the door is opened, completing the ground for the chime?
