Federal signal ford smart siren

medic550

Premium Member
Looking for info on a federal made smart siren for ford crown Vic’s. Has a special ford plug on it and has a ford part number. 5W7J-70443-aa.

Tried calling federal and the guy I spoke with said he had nothing and passed me off to crown America which I can’t also find info.

Does anyone have a wiring diagram for this model? I appear to have a complete one with a small pigtail but don’t want to just start pumping 12 volts on wires.

Thanks
 

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medic550

Premium Member
Well i got some info. Apparently the outputs for the lights on this are negative switch low current. Basically have to use a relay on each output to turn on a circuit.

Hence why there is no heavy positive input on these.
 
Well i got some info. Apparently the outputs for the lights on this are negative switch low current. Basically have to use a relay on each output to turn on a circuit.

Hence why there is no heavy positive input on these.
So you have to hook up a relay between the lights and control box. Do you have a whirring diagram
 
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medic550

Premium Member
It has to be a relay. I used a Lin3 which it was able to flash but when i switched to a double avenger it went bonkers.

Its a very low current to activate an external relay.
 

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