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running lights and turn signals


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allen newton 
Member - Posts: 6
Member spacespace
Joined: November 10, 2008
Location: California, United States
Posted: November 10, 2008 at 7:57 PM / IP Logged  
I'm putting together a 1937 plymouth coupe, it didn't come with running lights or turn signals on the front of the car. We made up some LED's lights to use. How do I wire the light so the LED's will light when the running lights are on and flash when the turn signal is on and also flash when the running lights are off.
Currently I have three wires in the headlight bucket, ground, left turn, and running.
Thanks,
Allen
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: November 11, 2008 at 2:54 AM / IP Logged  
LED's are polarity sensitive so you can't flip the power on them. I looked at doing this with relays, but I couldn't work it out with just two. However it looks like it's doable with diodes. Tie both the parking and turn signal wires to both leads and use diodes to control polarity. So when the parking lights are on, turns off, positive flows from the parking lights to turn signal. When the parking lights are on and the turn signals are on, you have no ground so the leds aren't illuminated. When you have the parking lights off and turn signals on, positive flows from the turn signal to the parking light wire. With both off, there is no positive.
Assuming both wires are hot when active.running lights and turn signals -- posted image.
allen newton 
Member - Posts: 6
Member spacespace
Joined: November 10, 2008
Location: California, United States
Posted: November 11, 2008 at 9:23 AM / IP Logged  
Great,
I'll give it a try today.
Thanks,
Allen
ckeeler 
Gold - Posts: 1,461
Gold spacespace
Joined: June 20, 2008
Location: New Mexico, United States
Posted: November 11, 2008 at 10:05 AM / IP Logged  

you CAN do this with a relay. i wrote up on this site how to do it for another guy that wanted to flash the LED marker lamps on his tow truck when he flipped a switch. you need 2 relays, one for each side of the car, and 2 LED flashers, one for each side of the car. they must be LED flashers as a standard flasher wont work with LED lights. use the below diagram. you need  to use this setup twice, one for each side, left and right

running lights and turn signals -- posted image.

allen newton 
Member - Posts: 6
Member spacespace
Joined: November 10, 2008
Location: California, United States
Posted: November 11, 2008 at 4:26 PM / IP Logged  
With the diagram using the relays, two questions-
1) Since I using the normal 1157 rear lights should the standard flasher work?
2) I'm a dummy, on the diagram what is the circle to the upper left with X and L in it?
Thanks for all of the help!
Allen
ckeeler 
Gold - Posts: 1,461
Gold spacespace
Joined: June 20, 2008
Location: New Mexico, United States
Posted: November 11, 2008 at 4:38 PM / IP Logged  
oh your not a dummy. i guess i didnt explain good enough. the circle is the flasher. and yes if you have standard bulbs in the back this will work fine with a standard flasher. for some reason i thought you had all LED's.
ckeeler 
Gold - Posts: 1,461
Gold spacespace
Joined: June 20, 2008
Location: New Mexico, United States
Posted: November 11, 2008 at 4:47 PM / IP Logged  
question: did you install a modern fuse box with new style fuses in it with the built in socket for a flasher like from painless wiring or some other hot rod aftermarket harness company? if so, i can give you another diagram to use that built in flasher.
allen newton 
Member - Posts: 6
Member spacespace
Joined: November 10, 2008
Location: California, United States
Posted: November 11, 2008 at 5:26 PM / IP Logged  
Yes, by memory it's a ron francis kit.
Thanks
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: November 11, 2008 at 5:52 PM / IP Logged  
I passed on that diagram because you have to catch power between the turn signal switch and the flasher. I'd like to see the other diagram as well.
ckeeler 
Gold - Posts: 1,461
Gold spacespace
Joined: June 20, 2008
Location: New Mexico, United States
Posted: November 11, 2008 at 5:54 PM / IP Logged  

allen newton wrote:
Yes, by memory it's a ron francis kit.
Thanks

can you give me the part number of your kit?

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