Turn Signal to Constant Output for LEDs

I am building headlights for my 98.5 Dodge Ram 2500. I am trying to use sequential turn signals in the front which require a constant 12v. I have reviewed the pulsed to constant output diagram but am in need of some clarification as to what size diode, capacitor and resistor I will need. How long will the specified diode keep the relay closed?

A bigger capacitor will keep it engaged longer. That diagram as it sits will be a constant output as long as the blinker is sending it's usual pulses.

Ok cool. That’s what I was looking for. Does the type of diode matter? I’m pretty new to more in depth vehicle wiring

A one amp switching/rectifying diode will be fine.

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My ex once told me I have a perfect face for radio.

Got the diode and built my circuit. The diode discharges almost instantly and does not hold the relay closed at all. I am using a typical automotive relay. How big of a capacitor do I need to hold it closed for a second or two? Can I add multiple capacitors together to make the micorfarads I need?

You only need to keep the relay energized for about half a second. Make sure the diode is oriented correctly. You can parallel more capacitors if necessary.
Also a higher resistance coil in a smaller relay may be appropriate - perhaps your relay is larger than required.

What size capacitor did you use? The diagram calls for 10,000 microfarads. Yes you can parallel capacitors to achieve 10,000

Turns out if you have install a 10 microfarad capacitor instead of a 10k microfarad capacitor it won’t work correctly. Thanks for all the help guys. You have been a huge help👍🏻