Another L.E.D Turn Signal Problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nrb's70gmc · 12-17-2017, 06:57 PM

Ive searched the web and this site, but cant seem to get a straight answer.

ive been running Regular bulb up front with led tail-brake-reverse lights for years (with a standard flaser 10+ years)

i installed led front lights and bought one of these
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

wired up the ground and no flash/blink lights (parking) are on solid

the new flasher has the same pin position as the stock one i pulled out
old flasher says (HEAVY-DUTY FLASHER FUSE INPUT LEAD)
new flaher says(HEAVY DUTY INPUT LEAD MUST BE FUSED)

Any idea's Thanks (truck = 1970 gmc)

harpo231 · 12-17-2017, 07:46 PM

I thought needed a 3 prong

Andy4639 · 12-17-2017, 08:02 PM

They make adapter for the flasher to swap polarity to make them work. LED are polarity sensitive where the regular bulbs are not. It could be the grounds also on the front turn signal housing not making good contact.

nrb's70gmc · 12-17-2017, 09:38 PM

if their were bad grounds wouldnt that prevent the parking lights from working?
my parking ligts are on solid. just dont blink.

Andy4639 · 12-18-2017, 07:10 AM

Quote:

Originally Posted by nrb's70gmc

if their were bad grounds wouldnt that prevent the parking lights from working?
my parking ligts are on solid. just dont blink.

Not necessarily. They are separate circuits but I think the problem is the polarity.

nrb's70gmc · 12-18-2017, 08:35 PM

Quote:

Originally Posted by Andy4639

Not necessarily. They are separate circuits but I think the problem is the polarity.

So I just made some short leads to test. (Flasher is plugged in opposite) still solid no blink. This is the electronic led flasher /w ground wire

**Already Gone** · 12-18-2017, 02:37 PM

Quote:

Originally Posted by nrb's70gmc

Ive searched the web and this site, but cant seem to get a straight answer.

ive been running Regular bulb up front with led tail-brake-reverse lights for years (with a standard flaser 10+ years)

i installed led front lights and bought one of these
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

wired up the ground and no flash/blink lights (parking) are on solid

the new flasher has the same pin position as the stock one i pulled out
old flasher says (HEAVY-DUTY FLASHER FUSE INPUT LEAD)
new flaher says(HEAVY DUTY INPUT LEAD MUST BE FUSED)

Any idea's Thanks (truck = 1970 gmc)

What did you wire the ground to? I have the same flasher as Andy posted and used one of the screws from the dimmer switch for ground and as Andy says the polarity has to be right for them to work properly.

nrb's70gmc · 12-18-2017, 10:22 PM

Quote:

Originally Posted by Already Gone

What did you wire the ground to? I have the same flasher as Andy posted and used one of the screws from the dimmer switch for ground and as Andy says the polarity has to be right for them to work properly.

First ground was on bracket under steering coulum (my tach uses one of those screws for a ground also)

Tested. Solid leds

polarity is just reverseing the pins while plunged into fuse panal right?
I made some short jumper wires and switched the pins and put the flasher ground to the dimmer mounting screw.

Tested. Solid leds

nrb's70gmc · 12-20-2017, 06:27 PM

FIXED

ok long story short my flasher set up as follows

THE HAZARDS FLASHER
a electronic flasher with polerity reverser installed (with ground wire grounded)

THE TURN SIGNAL FLASHER
a electronic no load "reverse polerity" flasher (no ground wire)
this is the original flasher i baught and tried but did not work.

THE PROBLEM =
becouse i did not have a hazard flasher i didn't realize my hazard button was set to on
of course the blinkers didn't blink. i just tested this theory and thats what it was.

You know sometimes my blonde hair makes me not think clearly lol.

Andy4639 · 12-20-2017, 10:05 PM

Quote:

Originally Posted by nrb's70gmc

FIXED

ok long story short my flasher set up as follows

THE HAZARDS FLASHER
a electronic flasher with polerity reverser installed (with ground wire grounded)

THE TURN SIGNAL FLASHER
a electronic no load "reverse polerity" flasher (no ground wire)
this is the original flasher i baught and tried but did not work.

THE PROBLEM =
becouse i did not have a hazard flasher i didn't realize my hazard button was set to on
of course the blinkers didn't blink. i just tested this theory and thats what it was.

You know sometimes my blonde hair makes me not think clearly lol.

Very cool sir! Glad you got it figured out.

Robznob11,
we got nrb's70gmc fixed up.

nrb's70gmc · 12-20-2017, 10:49 PM

Quote:

Originally Posted by Andy4639

Very cool sir! Glad you got it figured out.

Robznob11,
we got nrb's70gmc fixed up.

Just finished up. the flasher without the ground didn't make noise I'm anal so now both flashers match lol(two reverse polarity flashers with ground wires grounded)

In my defence I did mention I'd never had a hazard flasher installed. No one ever mentioned make sure your hazard button isn't on. Lol

I sure did fill like a ra-tard when I figured that out

Andy4639 · 12-21-2017, 08:35 AM

That's what my post was for when I went out and checked mine. I had thought maybe this was it.

We have all been there. Don't feel bad it's just part of the game.

12-17-2017, 06:57 PM	#1
nrb's70gmc Registered User Join Date: Sep 2008 Location: magalia,ca Posts: 366	Another L.E.D Turn Signal Problem Ive searched the web and this site, but cant seem to get a straight answer. ive been running Regular bulb up front with led tail-brake-reverse lights for years (with a standard flaser 10+ years) i installed led front lights and bought one of these https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 wired up the ground and no flash/blink lights (parking) are on solid the new flasher has the same pin position as the stock one i pulled out old flasher says (HEAVY-DUTY FLASHER FUSE INPUT LEAD) new flaher says(HEAVY DUTY INPUT LEAD MUST BE FUSED) Any idea's Thanks (truck = 1970 gmc) __________________ 1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

12-17-2017, 07:46 PM	#2
harpo231 Registered User Join Date: Nov 2014 Location: Lincoln City DE Posts: 1,292	Re: Another L.E.D Turn Signal Problem I thought needed a 3 prong __________________ Stan 67 swb BLU MULE posted via flip-fone

12-17-2017, 08:02 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Another L.E.D Turn Signal Problem They make adapter for the flasher to swap polarity to make them work. LED are polarity sensitive where the regular bulbs are not. It could be the grounds also on the front turn signal housing not making good contact. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

12-17-2017, 09:38 PM	#4
nrb's70gmc Registered User Join Date: Sep 2008 Location: magalia,ca Posts: 366	Re: Another L.E.D Turn Signal Problem if their were bad grounds wouldnt that prevent the parking lights from working? my parking ligts are on solid. just dont blink. __________________ 1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

12-20-2017, 06:27 PM	#9
nrb's70gmc Registered User Join Date: Sep 2008 Location: magalia,ca Posts: 366	Re: Another L.E.D Turn Signal Problem FIXED ok long story short my flasher set up as follows THE HAZARDS FLASHER a electronic flasher with polerity reverser installed (with ground wire grounded) THE TURN SIGNAL FLASHER a electronic no load "reverse polerity" flasher (no ground wire) this is the original flasher i baught and tried but did not work. THE PROBLEM = becouse i did not have a hazard flasher i didn't realize my hazard button was set to on of course the blinkers didn't blink. i just tested this theory and thats what it was. You know sometimes my blonde hair makes me not think clearly lol. __________________ 1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

12-21-2017, 08:35 AM	#12
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Another L.E.D Turn Signal Problem That's what my post was for when I went out and checked mine. I had thought maybe this was it. We have all been there. Don't feel bad it's just part of the game. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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