Signal Light Blinker Wiring

Dirt2Oil · Apr 29, 2013

I am trying to install signal lights to a 72 Commando which did not come with any. If anyone could give me some information as to which wires to connect to the blinker ( I have a 3 prong electronic automotive blinker) I would greatly appreciate the help. There are a few wires around the rectifier and capacitor but I am afraid to just connect and try for fear of frying something. I have a white/red, white/purple which appear to be together, and also have a green and two white(which join to be one). Any suggestions?

L.A.B. · Apr 30, 2013

Dirt2Oil said:
I am trying to install signal lights to a 72 Commando which did not come with any. If anyone could give me some information as to which wires to connect to the blinker ( I have a 3 prong electronic automotive blinker) I would greatly appreciate the help. There are a few wires around the rectifier and capacitor but I am afraid to just connect and try for fear of frying something. I have a white/red, white/purple which appear to be together, and also have a green and two white(which join to be one).

The harness blinker wires are green/white [GW](R/H circuit) and green/red [GR](L/H). This information is on the '72 wiring diagram.

Dirt2Oil said:
( I have a 3 prong electronic automotive blinker)

The standard flasher unit is a two pin item. A three pin type may or may not work, depending on which type of three pin item it is. The double white [W] and "green" shown in your second photo could be the wires to the flasher unit, however, the green should be a light green/brown wire [LG/N] according to the wiring diagram. The white/red and white/purple are extra wires, and have nothing to do with the flasher/blinker wiring.

kevbo82 · Apr 30, 2013

My 73 is green/brown and the double white like your second photo. The original Lucas blinker was too slow and unreliable for my liking so I got a cheapie two prong from napa and have had zero problems. The green/brown goes on the L terminal and the whites on the X(which was B on the Lucas)

http://m.napaonline.com/parts/PartsDeta ... 0325227224

Dirt2Oil · May 1, 2013

Thanks for the help folks. I connected the two white/ green and still no lights. I guess there are other problems I have to deal with as well. I will start tracing the whole wiring harness and see what I find. When I initially installed the lights I got them to come on solid briefly but nothing since. :cry:

kevbo82 · May 1, 2013

Dirt2Oil said:
Thanks for the help folks. I connected the two white/ green and still no lights. I guess there are other problems I have to deal with as well. I will start tracing the whole wiring harness and see what I find. When I initially installed the lights I got them to come on solid briefly but nothing since. :cry:

are you using original turn signals or new aftermarket ones? I added the new aftermarket ones (for safety not looks!) and added separate ground wires to them because i didn't know how well all the chromed plastic stuff was going to ground. The two places i would think to check first would be grounding and the switch for the signals

Dirt2Oil · May 1, 2013

They are the Lucas turn signal, bought from the UK. I will try a grounding wire next and look at the switch. I did have the switch apart and there was a lot of white crud that came out of there.

Dirt2Oil · May 1, 2013

I've found the problem, it was the switch. Took it apart and the little spring and ball bearing inside was not closing the circuit. Also one of the rear lights was not grounding so I ran some grounding wires.
Thanks for the help!

kevbo82 · May 2, 2013

Dirt2Oil said:
I've found the problem, it was the switch. Took it apart and the little spring and ball bearing inside was not closing the circuit. Also one of the rear lights was not grounding so I ran some grounding wires.
Thanks for the help!

cool. I took all those apart when i redid my bike to clean them up, i was amazed they all worked when i put them back together. Glad ya found the problem.

warpedscout · May 2, 2013

I had the same problem with my signals when I got the bike initially running, the switch was bad. Cleaned it up but was too far gone. Found a couple of switches and orderd two (one for back up) and worked fine! Cannot remember if I ordered from Steadfast or Flea Bay?!

About aftermarket lights, do you need to do a negative ground conversion or will they work positive ground? Thought about getting some like Matt uses at CNW, they are nice and clean looking!

Hobot · May 2, 2013

On a work break so stick nose in this tent, flashing back on much turmoil to get stable winkers finally hauled off hitting the signal half wanting it to break to replace but it worked fine for some rides, then had to repeat til finally had to wire to by pass the screwed chrome layer conductor.

Incandescent bulbs don't care polarity but LED's sure do and rather rare to en find in Positive Earth mounting models but are out there in parts or whole kits.

kevbo82 · May 2, 2013

warpedscout said:
About aftermarket lights, do you need to do a negative ground conversion or will they work positive ground? Thought about getting some like Matt uses at CNW, they are nice and clean looking!

I used the cheapie Lucas look A likes old britts sells. I ran a second wire inside it and screwed it down then soldered a Lucas bullet on the end and tied them into the ground in the wiring harness on my stock post ground

Signal Light Blinker Wiring

Dirt2Oil

L.A.B.

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