1970 B-body Rally Dash Wiring

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carfreak6970

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Hello,

So I know this isnt an A-body but I was hoping someone here would be able to assist me in my quest for knowledge:

I am working on restoring a 70 Dodge Charger with my dad and we are trying to get the car to the road worthy stage but hit a road block. So for the wiring on this car there is suppose to be a diode in the instrument panel wiring. I attached the wiring diagram in the pictures below. We do not have this diode. Is this crucial to the function of the wiring system? and where can I get one?

dash wiring 2.jpg


dash wiring 1.jpg
 
Looks like the key in buzzer diode. Not needed unless you want the buzzer to work
 
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