Re: LED brake light/turn signal bar
Posted by HH56 On 2024/3/21 15:46:19
If that is the 6v bar from BrakeLighter which is sold by several vendors then it would work as a third brake light only on the 47. Several have used their product on other Packards and have reported no difficulty. Since it is an LED assy, polarity is important so do pay attention to that when hooking up the wires. If it is 12v or not the BrakeLigher bar then would need to see a wiring diagram to see if it would work for sure.
As to working with turn signals, the 47 still uses the early turn signal system which is sort of an add on stand alone. it shares the dual filament front park light bulb and lights the large filament same as later cars. Unlike later cars, turn signals are not integrated with brakes so do not share the same rear bulb and filament with the brake lights. The turn signals use separate wires and rear bulbs so you would not be able to tie the brake and turn signal wires directly together to power the bar without causing issues. The brake warning is more important so a single bar should be wired to the brakes. In that instance the bar will not indicate turns but will light as a third brake light only.
You could possibly use steering or blocking diodes to separate the two signals and power a single bar but the solid on brake signal would override everything. Turn signal flashes would not be visible as long as brake was on. IMO, it would be much easier and less chance of problems to buy a second bar. You could stack the two one above the other or place them end to end. Wiring the bars could be done in different ways depending on how you wanted the lights or functions to be presented.
Here is an extraction of the 47 turn signal circuit for future reference.
Attach file:
46-7 turn signal extraction.jpg (153.64 KB)
As to working with turn signals, the 47 still uses the early turn signal system which is sort of an add on stand alone. it shares the dual filament front park light bulb and lights the large filament same as later cars. Unlike later cars, turn signals are not integrated with brakes so do not share the same rear bulb and filament with the brake lights. The turn signals use separate wires and rear bulbs so you would not be able to tie the brake and turn signal wires directly together to power the bar without causing issues. The brake warning is more important so a single bar should be wired to the brakes. In that instance the bar will not indicate turns but will light as a third brake light only.
You could possibly use steering or blocking diodes to separate the two signals and power a single bar but the solid on brake signal would override everything. Turn signal flashes would not be visible as long as brake was on. IMO, it would be much easier and less chance of problems to buy a second bar. You could stack the two one above the other or place them end to end. Wiring the bars could be done in different ways depending on how you wanted the lights or functions to be presented.
Here is an extraction of the 47 turn signal circuit for future reference.
Attach file:
46-7 turn signal extraction.jpg (153.64 KB)
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