wig wag light flashing

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=29909
Printed Date: July 23, 2025 at 7:04 AM

Topic: wig wag light flashing

Posted By: chasesaccessori
Subject: wig wag light flashing
Date Posted: April 07, 2004 at 5:36 PM

Without purchasing a ready made unit, what is the easiest way to make two separate lights (front left and right turning signals with separate wires of course) flash alternately? Is it as easy as a two way flasher? And would you want to isolate the wig wag from the turning signals?

Just so I don't get preached at. This is going on a Highway inspection truck.

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(owner/installer)
Chase's Accessories
Ridgecrest, CA
in business since 92

Replies:

Posted By: chasesaccessori
Date Posted: April 08, 2004 at 4:02 PM

For all those interested I worked out and have now tested this circuit I drew up below. This can be added to any vehical and is very eyecatching especially on a car parked in a parking lot with the alarm going off. I originally designed it to go on a Highway Inspection vehical to add another visual effect for motorists to see the truck. With parts used you save approximately $50 from purchasing a premade unit from the companies.

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(owner/installer)
Chase's Accessories
Ridgecrest, CA
in business since 92

Posted By: its_radio_shop
Date Posted: April 09, 2004 at 2:19 AM

If anyone is interested you can buy the modules built to do this for around $35.00. The Whelen UHF2150A is a good unit and will work with positive and negative switching headlights, gives multiple flash patterns and will do park lights. It also has high beam override. https://lightbarsetc.homestead.com/Head_Tail_Flashers.html

Posted By: Thack79
Date Posted: April 09, 2004 at 8:21 AM

Chase, I am trying to do the same, but some of the lines arent dark enif for me to see. is 87a used? and does the "L" in the flasher go to 87 of the bottom relay?

Posted By: the12volt
Date Posted: April 09, 2004 at 8:34 AM

Thack79, take a peek at this thread: https://www.the12volt.com/installbay/forum_posts.asp?tid=29983&PN=1

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Posted By: Thack79
Date Posted: April 09, 2004 at 9:55 AM

Thanks man

Posted By: the12volt
Date Posted: April 09, 2004 at 10:18 AM

You're welcome ;)

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Posted By: chrias
Date Posted: May 24, 2004 at 6:35 PM

Chase,

I have tested your circuit diagram on my 86 Pontiac Grand Prix and it doesn't alternate the lights. It just flashes both hi beams. Any ideas as to why it's not alternating?

I'm thinking of redoing the connections according to this thread:

https://www.the12volt.com/installbay/forum_posts.asp?tid=11760