Front blinkers not working - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andrewpclayton · 07-24-2019, 10:57 AM

Hi everyone..
I have a new to me column from another 69 in my truck after the auto trans conversion. All is working except the front marker turn signal lights. (Don’t have bulbs in the sides as I’m going to fill those holes)
With headlights on, the lights come on solid, but with headlights on or off they do not blink with blinker.
Previously the left side only worked with right side coming on solid only. Then I tried my hazard lights, nothing worked and the blinkers no longer worked on left.
So I got a brand new flasher, and now I’m here with only rear blinkers. 1157 bulbs.

The rear both work fine. What should I check first?

bozly · 07-24-2019, 04:15 PM

put working bulbs in your side marker lights up front. I had weird issues with my blinker and once I made sure the blinker grounds were good and put bulbs in the side markers I have not had any of the issues I previously had (which were similar to yours).

andrewpclayton · 07-24-2019, 04:17 PM

I will give that a shot thanks!

LuckyScott · 07-24-2019, 07:55 PM

Make sure they are grounded

**Sheepdip** · 07-25-2019, 01:27 AM

As stated check and verify grounds.

rpmerf · 07-25-2019, 07:17 AM

Given that the running lights work, I think it is unlikely that it is a grounding issue. Side markers should just be running lights, not turn signals, so I do not think they would effect turn signals. I could be wrong, and these are easy things worth testing.

http://outintheshop.com/faq/wiring/w...s/image002.jpg
http://outintheshop.com/faq/wiring/w...s/image003.jpg

According to the diagram, it appears the indicators on the dash are connected to the front bulbs, right after the turn signal switch. I believe this means that if your dash indicators are NOT working, but your rears are flashing correctly, then the switch is to blame. If the indicators ARE working, then the problem is between the switch connector and the light.

I would get the test light out and start following it from one end to the other. Test it at the bulb socket. Test it at the connector for the lights above the column. If the connector above the column looks good, but there is no voltage at the sockets, inspect the bulkhead on the firewall.

07-24-2019, 10:57 AM	#1
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Front blinkers not working Hi everyone.. I have a new to me column from another 69 in my truck after the auto trans conversion. All is working except the front marker turn signal lights. (Don’t have bulbs in the sides as I’m going to fill those holes) With headlights on, the lights come on solid, but with headlights on or off they do not blink with blinker. Previously the left side only worked with right side coming on solid only. Then I tried my hazard lights, nothing worked and the blinkers no longer worked on left. So I got a brand new flasher, and now I’m here with only rear blinkers. 1157 bulbs. The rear both work fine. What should I check first? __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

07-24-2019, 04:15 PM	#2
bozly Registered User Join Date: Sep 2018 Location: Sumner, WA Posts: 34	Re: Front blinkers not working put working bulbs in your side marker lights up front. I had weird issues with my blinker and once I made sure the blinker grounds were good and put bulbs in the side markers I have not had any of the issues I previously had (which were similar to yours).

07-24-2019, 04:17 PM	#3
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Re: Front blinkers not working I will give that a shot thanks! __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

07-24-2019, 07:55 PM	#4
LuckyScott Registered User Join Date: Jun 2010 Location: Anaheim, Calif. Posts: 361	Re: Front blinkers not working Make sure they are grounded

07-25-2019, 01:27 AM	#5
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,633	Re: Front blinkers not working As stated check and verify grounds.

07-25-2019, 07:17 AM	#6
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Re: Front blinkers not working Given that the running lights work, I think it is unlikely that it is a grounding issue. Side markers should just be running lights, not turn signals, so I do not think they would effect turn signals. I could be wrong, and these are easy things worth testing. http://outintheshop.com/faq/wiring/w...s/image002.jpg http://outintheshop.com/faq/wiring/w...s/image003.jpg According to the diagram, it appears the indicators on the dash are connected to the front bulbs, right after the turn signal switch. I believe this means that if your dash indicators are NOT working, but your rears are flashing correctly, then the switch is to blame. If the indicators ARE working, then the problem is between the switch connector and the light. I would get the test light out and start following it from one end to the other. Test it at the bulb socket. Test it at the connector for the lights above the column. If the connector above the column looks good, but there is no voltage at the sockets, inspect the bulkhead on the firewall. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z



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