Main Menu

I want blinking marker lights.

Started by Racer57, April 11, 2025, 08:13:42 PM

Previous topic Next topic

0 Members and 1 Guest are viewing this topic.

70_440-6Cuda

#15
you are adding the load of the coil, but that coil is only about 150 mA as opposed to about 2 Amps for a typical incandescent bulb.  I don't think there is enough load from the relay to affect the flasher - that is the whole point of a relay, taking the load off of the circuit activating the relay.

I spent the first 10 years of my professional career designing, building and installing automotive audio / video and security systems before you could buy those things off the shelf and the use of relays to create switching and control systems was invaluable - amazing what you can due with a pulse timer and a relay!
You can't buy happiness, but you can buy horsepower and that's kind of the same thing.....

YellowThumper

Quote from: 70_440-6Cuda on April 23, 2025, 03:59:59 PMyou are adding the load of the coil, but that coil is only about 150 mA as opposed to about 2 Amps for a typical incandescent bulb.  I don't think there is enough load from the relay to affect the flasher - that is the whole point of a relay, taking the load off of the circuit activating the relay.

I spent the first 10 years of my professional career designing, building and installing automotive audio / video and security systems before you could buy those things off the shelf and the use of relays to create switching and control systems was invaluable - amazing what you can due with a pulse timer and a relay!

Thanks for posting up the diagram.
Saved me from finishing my writeup.
Same layout as you described.
Just worded better than what I had going. Lol
Using several delay timers for my build.
1 is to have engine run for a measured time after key is shutoff. (Turbo cooling).
Second is to allow accessory power for duration with key off.
USB, 120v inverter and stereo, etc...
Life is to be viewed thru the windshield. Not rear view mirror.
You are the only one in charge of your destiny.

Mike.

Racer57

Quote from: 70_440-6Cuda on April 16, 2025, 03:30:49 PMWith a relay and the proper gauge wire this could be done easily from either under the dash or under the hood.  Depends on if you are only activating front markers, or both front and rear.  You could place 2 relays under the dash and pick up ground and the TS input under the dash, run the 2 wires from Pin 30 and 86 out to the marker light.  You then just need to "interrupt" the positive feed to the marker light with the 2 wires from 30 & 86.

This set up would be alternating flashing of the parking light and the marker light.  If you wanted synchronized flashing it is the same principle with slight variation in wiring the relay.

Pin 87a connected to the parking light feed
Pin 30 to the marker bulb
Pin 85 grounded
Pin 86 to the turn signal input
Pin 87 left unused

Could you post a ebay, etc. link to buy the relay ?  I know nothing about them. Thanks for your help !!


70_440-6Cuda

You can search for automotive SPDT relay and any 10 amp or above will work.  I am sure you can get them at the local auto parts house. I prefer the mini relays, you don't a 40 amp relay.  Glad I could finally offer some tech help!!

Here are a couple options:
Mini Relay and socket

Mini relay
Standard relay


You can't buy happiness, but you can buy horsepower and that's kind of the same thing.....

dodj

Quote from: 70_440-6Cuda on April 23, 2025, 03:59:59 PMyou are adding the load of the coil, but that coil is only about 150 mA as opposed to about 2 Amps for a typical incandescent bulb. 
Sorry I said it backwards in the previous post, it's that DROP in load that causes the issue. The flasher sees 1.7 amps less...so flasher flashes slower.
"There is nothing your government can give you that it hasn't already taken from you in the first place" -Winston Churchill

Katfish

With the relay providing the switching, the marker light will no longer be on with lights?
Looks like it breaking the positive feed?

70_440-6Cuda

#21
Quote from: Katfish on April 24, 2025, 06:28:01 AMWith the relay providing the switching, the marker light will no longer be on with lights?
Looks like it breaking the positive feed?

No, the marker is on all the time with the parking/headlights as normal - pin 30 and 87a are connected, when the relay coil energizes it is like a switch and pin 87 and 30 are then connected, essentially disconnecting 87a and 30 and interrupting power to the marker light bulb
You can't buy happiness, but you can buy horsepower and that's kind of the same thing.....


dodj

Quote from: 70_440-6Cuda on April 24, 2025, 09:42:06 AM
Quote from: Katfish on April 24, 2025, 06:28:01 AMWith the relay providing the switching, the marker light will no longer be on with lights?
Looks like it breaking the positive feed?

No, the marker is on all the time with the parking/headlights as normal - pin 30 and 87a are connected, when the relay coil energizes it is like a switch and pin 87 and 30 are then connected, essentially disconnecting 87a and 30 and interrupting power to the marker light bulb

 :bigthumb:
Got it.
"There is nothing your government can give you that it hasn't already taken from you in the first place" -Winston Churchill

Racer57

Quote from: 70_440-6Cuda on April 23, 2025, 10:53:10 PMYou can search for automotive SPDT relay and any 10 amp or above will work.  I am sure you can get them at the local auto parts house. I prefer the mini relays, you don't a 40 amp relay.  Glad I could finally offer some tech help!!

Here are a couple options:
Mini Relay and socket

Mini relay
Standard relay

Thank you !

Racer57

Probably stupid question, but here goes.......  One relay is required for each side marker, correct ?

 I have the relays on order. Today I looked over the wiring and I realized that since everything has a 2 post flat connector, I can simply make "plug and play" connectors for everything instead of splicing.  :D 

Btw, whoever designed the side markers outta be shot ! I pulled both front markers out. Will do the rears tomorrow. Had both on bench while I replaced the bulbs with LEDs. After moving my body into positions that I didn't know it could still do and fighting to get them back into place, finally found that the lens had to be put back on in a certain way.  :-[   

70_440-6Cuda

You would need 1 relay per side, you should be able to run front and year on 1 relay, but may be easier to put a pair in the trunk for the rear markers.  Just make sure the relay is at least 15 amp, should be more than enough
You can't buy happiness, but you can buy horsepower and that's kind of the same thing.....