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new turn signal woes - flasher? #1331526 Mon Oct 28 2019 04:59 AM
Joined: Jul 2019
Posts: 37
M
morerog Offline OP
Wrench Fetcher
Wired in a new aftermarket turn signal switch (such as United Pacific style from Summit Racing) and strange things are afoot.

The quick specs:

1951 chevy 3600
headlights were re-wired to to hi/lo relay circuits and work great.
all the wiring is per original coming off the headlight switch for stop, tail, flasher, etc.
I have checked and re-checked connections, wiring diagrams, and even changed fixtures thinking a faulty product.
Original parking lights, new 12v headlights, new front and rear directional signals that are capable of stop/tail/directional functionsu.

With headlights OFF everything works except the right front blinker. (the bulb may have burnt out but I can't tell). ts brand new set so that would be strange.
With headlights ON the RF blinker still does not work. The LR blinker works but does not stay illuminated during the unlit part of the blinking cycle as you would expect to show the running lights on when the headlights are on. The RR blinker works and in stays illuminated during the unlit part of the blink cycle. When it blinks with the headlight on it just blinks brighter like its supposed to. But the LR goes dark when its not blinking.
With headlights ON and brake applies still no RF, and NOTHING - not even a blink on the LR.

Could it be the flasher?

Other ideas? I'm not sure how to test this?
Thnks
Rog

Re: new turn signal woes - flasher? [Re: morerog] #1331539 Mon Oct 28 2019 12:36 PM
Joined: Feb 2019
Posts: 377
P
Phak1 Offline
Shop Shark
Make sure that the flasher is matched to the type of bulbs you are using. LED bulbs require a LED flasher and incandescent require a flasher made for incandescent bulbs.

I had the same problem only my lights were incandescent and the flasher was for LED.


Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: new turn signal woes - flasher? [Re: Phak1] #1331541 Mon Oct 28 2019 12:54 PM
Joined: Sep 2001
Posts: 28,891
tclederman Offline
Boltergeist
Good reply from Phil.

I'll add, because it was not explicitly stated in the first post:

You need a different flasher for 6v or 12 systems and for incandescent bulbs (and/or mixed incandescent/LED bulbs, maybe).


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: new turn signal woes - flasher? [Re: morerog] #1331567 Mon Oct 28 2019 03:25 PM
Joined: Jun 2011
Posts: 2,973
E
EdPruss Offline
Shop Shark
Do you have a VOM meter to check your wiring?

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
Re: new turn signal woes - flasher? [Re: morerog] #1331597 Mon Oct 28 2019 06:13 PM
Joined: Apr 2008
Posts: 734
F
Forty9 Offline
Shop Shark
Any recommendations for a 6V LED flasher?


Ed
Re: new turn signal woes - flasher? [Re: morerog] #1331632 Mon Oct 28 2019 10:09 PM
Joined: Sep 2001
Posts: 28,891
tclederman Offline
Boltergeist
Check Chevs of the 40s.

I got one from them and I got one off eBay.

3-prong LED flasher.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: new turn signal woes - flasher? [Re: morerog] #1331639 Mon Oct 28 2019 10:31 PM
Joined: Dec 2015
Posts: 2,027
69Cuda Offline
Big Bolt Forum Moderator
I would disconnect wires from the turn signal switch and start over with each light, checking running light function. Make sure each one is on when parking lights are pulled on. Once that is good, run hot to the bright element in each bulb one at a time and make sure all the other lights stay on. If not, you probably have a bad ground somewhere. If that all checks out good, then re-visit the turn signal switch.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof
Re: new turn signal woes - flasher? [Re: morerog] #1331822 Tue Oct 29 2019 10:39 PM
Joined: Jan 2018
Posts: 164
4
4100 Fire Truck Offline
Shop Shark
Bad grounds can do crazy stuff, like feedback to any path it can find even through a bulb.

Re: new turn signal woes - flasher? [Re: morerog] #1331898 Wed Oct 30 2019 01:45 PM
Joined: Apr 2008
Posts: 734
F
Forty9 Offline
Shop Shark
Still can't seem to find a part number for a 6V LED flasher. Lots of 12V, no 6V.


Ed
Re: new turn signal woes - flasher? [Re: morerog] #1331903 Wed Oct 30 2019 02:07 PM
Joined: Feb 2019
Posts: 377
P
Phak1 Offline
Shop Shark


Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: new turn signal woes - flasher? [Re: morerog] #1331923 Wed Oct 30 2019 04:19 PM
Joined: Sep 2001
Posts: 28,891
tclederman Offline
Boltergeist
In case you are interested, I am almost certain that the flasher that you linked-to makes a "clicking noise".
Many electronic flashers are silent.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: new turn signal woes - flasher? [Re: morerog] #1331942 Wed Oct 30 2019 07:15 PM
Joined: Apr 2008
Posts: 734
F
Forty9 Offline
Shop Shark
Thanks Phil and Tim. Guess I missed that site in my search! Ed


Ed
Re: new turn signal woes - flasher? [Re: morerog] #1332027 Thu Oct 31 2019 04:19 AM
Joined: Apr 2002
Posts: 1,536
F
Fox Offline
Shop Shark
I second the ground. My gmc did something similar. I simply ran a couple new ground wires from both turn signal housings to the frame. Problem solved.


In the Stovebolt Gallery
More pictures here

1951 GMC 9430 1 ton dually—-Shiny!

1970 Chevrolet C10 - Grandpa’s- My first truck.—in progress to shiny
1972 Chevrolet C20- rusted
1970 Chevrolet K20 Suburban—rusted.
1950 Chevrolet 1300- in progress to shiny.

Parts trucks-
1951 GMC 9300
1951-GMC 9430
1951- Chevrolet 1300
Re: new turn signal woes - flasher? [Re: morerog] #1332038 Thu Oct 31 2019 12:09 PM
Joined: Feb 2019
Posts: 377
P
Phak1 Offline
Shop Shark
I agree that the poor grounds will can cause strange behavior but I chased poor grounds for weeks before I found the LED flasher in my truck with all incandescent bulbs. The flasher is cheep and easy to change. It may not be the problem but you need to match LED flashers to LED bulbs and vice versa. Logically that is the place to start.


Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: new turn signal woes - flasher? [Re: morerog] #1332202 Fri Nov 01 2019 09:06 PM
Joined: Jan 2000
Posts: 524
D
Donsz Offline
Shop Shark
Did everything work fine before installing the turn signal switch?
don

Re: new turn signal woes - flasher? [Re: morerog] #1332320 Sat Nov 02 2019 08:36 PM
Joined: Jul 2019
Posts: 37
M
morerog Offline OP
Wrench Fetcher
Thanks for the input thus far. I have a new flasher on the way and will check the grounding. The old turn signal switch did work all for primary lights but the rears were directional only. I'll keep you posted.

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