Leds won't flash - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Curbstone Mech · 10-03-2004, 07:43 PM

I've had the rear leds and side marker leds for some time but today I tried yellow 1157 leds in the front and now none of the lights will flash if the parking lights or headlights are on. I have an electronic flasher and checked all the grounds. I know that the leds don't draw as much current and if I put incandescent bulbs back in the front turn/parking everything works- but I would like to use leds all around. Isn't there something in the newer cars and trucks they use when there are leds all around?
Thanks much!

Longhorn Man · 10-03-2004, 07:46 PM

Odd, with the electronic flasher, it should blink even if it is just one LED and nothing else.
What brand of flasher is it?

Curbstone Mech · 10-03-2004, 09:00 PM

It was a genuine "Pep Boys" Andy, so I guess its a cheap one. I was thinking of switching it out, they're cheap enough, I suppose.

Longhorn Man · 10-03-2004, 10:53 PM

I know the NAPA ones are pretty good, I think they are kinda pricey though.
But on my 69, it has LEDs in the back, and old bulbs up front. When I removed the front bulbs, it would still blink on just the LED load.

Curbstone Mech · 10-03-2004, 11:24 PM

We have a napa here, I' ll give it a shot.I sure hate to give up and turn it over to the auto electric shop, but I'm starting to get baffled. I thought there was a post about this some time ago, saying something about 'rzengineerining?" having a setup for all led lights to replace the electronic flasher.Back to the drawing board I guess. Thanks Andy. Glad you're back on the board helping the rest of us.

68w/sbc406 · 10-03-2004, 11:39 PM

hey curbie do you have a fleet side? do you have the 1157 led bulbs or a true led conversion in the back? i am thinking about making my own and was wondering how many leds the conversions consisted of. thanks(sorry for high jacking, hope the new flasher works for you)

70c10 · 10-03-2004, 11:48 PM

When I installed my LED's, I used a EL-12 Flasher.

Curbstone Mech · 10-04-2004, 12:08 AM

68w- yes, its a fleetside, I got the leds from a board member that was making them before he started making the for ECE. I think they are 120 leds each side but i will count them in the morning for you.
70c10- where idi you get your el-12 flasher?
Andy- the brand is TS- made in USA
Thanks guys

Longhorn Man · 10-04-2004, 12:13 AM

I'll have to look at mine tomorow and give you a name/part number.

Curbstone Mech · 10-04-2004, 12:33 AM

Thanks Andy

70c10 · 10-04-2004, 12:54 AM

I got it at Advance Auto Parts

Curbstone Mech · 10-04-2004, 10:05 AM

68wsbc406-
I counted the leds this morning, I was way off on my guess.
There are 168 leds and the board measures 2 3/8" wide and 8" tall
Hope it helps
My neighbor in Perry Hall- thanks & have a good weekend
Curbie

*FormerMember* · 10-04-2004, 11:46 AM

Where ae y'all getting your LED tail lights, etc?

When I went with all LED's on my motorcycle, I had to add a resistor to the circuit. Basically, the LED's had so little draw on the circuit that the flasher couldn't sense and flash.

Longhorn Man · 10-04-2004, 01:09 PM

Quote:

Originally Posted by grendel

Where ae y'all getting your LED tail lights...

( http://67-72chevytrucks.com/vboard/s...d.php3?t=72407 ) is how I did mine. i am trying to work up a similar set up for the step side guys.
Kinda butch, but pretty cheap compaired to the kits you can buy.

*FormerMember* · 10-04-2004, 04:49 PM

Thanks. I may hunt down the replacement lenses.

Nixon · 10-04-2004, 09:16 PM

Quote:

Originally Posted by grendel

Where ae y'all getting your LED tail lights, etc?

When I went with all LED's on my motorcycle, I had to add a resistor to the circuit. Basically, the LED's had so little draw on the circuit that the flasher couldn't sense and flash.

Hey Curbstone, I would follow this lead that grendel suggested. I am a Harley guy myself and though I haven't gone to LEDs yet, I have read many tech article in the bike mags that address this issue. I am thinking a resistor will solve your problems.

Good luck in finding the little electric gremlin.

BobbyK · 10-06-2004, 02:25 PM

Grendel is right.
LED's DO NOT draw enough amps to work with a reg flasher,even an electronic flasher didn't work for me.
You need the reg bulbs or as sugested use a resistor to help activate the flasher.

Curbstone Mech · 10-06-2004, 03:11 PM

Thanks for all the replies-
Anyone know what resistor to get or where it should go?

Nixon · 10-06-2004, 07:50 PM

You might try www.radiantz.com . They specialize in LEDs for motorcycles but since both are twelve volt and since a tailight is a tail light and a blinker a blinker they probably have a fix for you. If not, I bet they point you in the right direction. Good luck.

Curbstone Mech · 10-07-2004, 12:46 PM

Update
I just spoke to radiantz(thanks Nixon) they were very helpful. I ordered thier "flasher". As soon as I get it wired in I'll get get back to you all or do a FAQ. The leds I bought for the front have several yellow leds facing straight ahead,and about four small leds facing back into the housing. I painted the housing interior with chrome paint to bounce more light. If I can make it all work out, it should be nice setup.Thanks for all the help
Curbie

10-03-2004, 07:43 PM	#1
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	Leds won't flash I've had the rear leds and side marker leds for some time but today I tried yellow 1157 leds in the front and now none of the lights will flash if the parking lights or headlights are on. I have an electronic flasher and checked all the grounds. I know that the leds don't draw as much current and if I put incandescent bulbs back in the front turn/parking everything works- but I would like to use leds all around. Isn't there something in the newer cars and trucks they use when there are leds all around? Thanks much! __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-03-2004, 09:00 PM	#3
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	It was a genuine "Pep Boys" Andy, so I guess its a cheap one. I was thinking of switching it out, they're cheap enough, I suppose. __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-03-2004, 11:24 PM	#5
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	We have a napa here, I' ll give it a shot.I sure hate to give up and turn it over to the auto electric shop, but I'm starting to get baffled. I thought there was a post about this some time ago, saying something about 'rzengineerining?" having a setup for all led lights to replace the electronic flasher.Back to the drawing board I guess. Thanks Andy. Glad you're back on the board helping the rest of us. __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-03-2004, 11:39 PM	#6
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	hey curbie do you have a fleet side? do you have the 1157 led bulbs or a true led conversion in the back? i am thinking about making my own and was wondering how many leds the conversions consisted of. thanks(sorry for high jacking, hope the new flasher works for you) __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

10-03-2004, 11:48 PM	#7
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	When I installed my LED's, I used a EL-12 Flasher. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

10-03-2004, 07:46 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Odd, with the electronic flasher, it should blink even if it is just one LED and nothing else. What brand of flasher is it?

10-03-2004, 10:53 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I know the NAPA ones are pretty good, I think they are kinda pricey though. But on my 69, it has LEDs in the back, and old bulbs up front. When I removed the front bulbs, it would still blink on just the LED load.

10-04-2004, 12:08 AM	#8
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	68w- yes, its a fleetside, I got the leds from a board member that was making them before he started making the for ECE. I think they are 120 leds each side but i will count them in the morning for you. 70c10- where idi you get your el-12 flasher? Andy- the brand is TS- made in USA Thanks guys __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-04-2004, 12:13 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I'll have to look at mine tomorow and give you a name/part number.

10-04-2004, 12:33 AM	#10
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	Thanks Andy __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-04-2004, 12:54 AM	#11
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	I got it at Advance Auto Parts __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

10-04-2004, 10:05 AM	#12
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	68wsbc406- I counted the leds this morning, I was way off on my guess. There are 168 leds and the board measures 2 3/8" wide and 8" tall Hope it helps My neighbor in Perry Hall- thanks & have a good weekend Curbie __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-04-2004, 11:46 AM	#13
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Where ae y'all getting your LED tail lights, etc? When I went with all LED's on my motorcycle, I had to add a resistor to the circuit. Basically, the LED's had so little draw on the circuit that the flasher couldn't sense and flash.

10-04-2004, 04:49 PM	#15
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Thanks. I may hunt down the replacement lenses.

10-06-2004, 02:25 PM	#17
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,772	Grendel is right. LED's DO NOT draw enough amps to work with a reg flasher,even an electronic flasher didn't work for me. You need the reg bulbs or as sugested use a resistor to help activate the flasher. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE



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10-06-2004, 03:11 PM	#18
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	Thanks for all the replies- Anyone know what resistor to get or where it should go? __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

10-06-2004, 07:50 PM	#19
Nixon Registered User Join Date: Sep 2004 Location: Burnet, Texas Posts: 53	You might try www.radiantz.com . They specialize in LEDs for motorcycles but since both are twelve volt and since a tailight is a tail light and a blinker a blinker they probably have a fix for you. If not, I bet they point you in the right direction. Good luck. __________________ My girlfriend caught me cheatin on her with another woman and now she's threatening to tell my wife! ____________________________________ 71 Chevy lwb Rough and Ready Baby!!

10-07-2004, 12:46 PM	#20
Curbstone Mech Active Member Join Date: Feb 2000 Location: Carroll County Maryland Posts: 300	Update I just spoke to radiantz(thanks Nixon) they were very helpful. I ordered thier "flasher". As soon as I get it wired in I'll get get back to you all or do a FAQ. The leds I bought for the front have several yellow leds facing straight ahead,and about four small leds facing back into the housing. I painted the housing interior with chrome paint to bounce more light. If I can make it all work out, it should be nice setup.Thanks for all the help Curbie __________________ 68 short fleet 383 stroker, 700r4 373:1 posi 72 GMC 3/4 ton- weekly driver 700r4 351;1 posi

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