The Ford Barn

wkvasnicka · 02-23-2024, 09:46 AM

My right signal lights flash as they should. However, the left side (front and rear) come on but do not flash. What could be the cause. Thanks

dmsfrr · 02-23-2024, 10:38 AM

If you have a 2 wire signal flasher they are load sensitive. One bulb may have a poor connection or be a similar bulb that has a different resistance/current rating.

Also check for corrosion of the signal light socket & its mounting screws, a poor electrical ground.

BW · 02-24-2024, 08:12 AM

Do your four ways work?

wkvasnicka · 02-25-2024, 11:30 AM

New bulbs and four way flashers work fine. Left signal lights burn brightly but will not flash. Right ones work just fine. Still a mystery.

KULTULZ · 02-25-2024, 12:01 PM

Just a thought but just a few years ago, CHI-COM 1157 BULBS SLOPPY COPIES were coming in. The two contact on the bottom of the bulbs would not make full contact with the lamp socket. Swap bulbs around.

It has been been mentioned previously, but a bad turn signal switch can give the same results. Have you tried checking socket continuity with a test light?

miker98038 · 02-25-2024, 03:49 PM

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If you have to get far into the wiring, this is the best diagram I ever found. I’m old, I bought the big one. Can also find on Amazon, but I didn’t compare pricing

https://classiccarwiring.com/

oldbugger · 02-25-2024, 07:16 PM

Do your brake lights work

BW · 02-26-2024, 09:15 AM

The first thing I would do is, rule out the flasher. Even if it works on the right side. Your car has two flashers turn signals and four way, flip them. The turn signal is on the drivers side air vent and the four way is near the glove box. One more thing are you using any led bulbs?

BW · 02-26-2024, 03:11 PM

If the indicator bulb is led that would be your problem.

frank long island · 02-27-2024, 05:15 PM

Did you check your ground

BW · 02-28-2024, 08:06 AM

If your car is a GT that would change my earlier reply on the indicator, because you have two.

02-23-2024, 09:46 AM	#1
wkvasnicka Member Join Date: Jun 2013 Location: Virginia Posts: 31	1965 Mustang signal lights My right signal lights flash as they should. However, the left side (front and rear) come on but do not flash. What could be the cause. Thanks

02-23-2024, 10:38 AM	#2
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,607	Re: 1965 Mustang signal lights If you have a 2 wire signal flasher they are load sensitive. One bulb may have a poor connection or be a similar bulb that has a different resistance/current rating. Also check for corrosion of the signal light socket & its mounting screws, a poor electrical ground.

02-24-2024, 08:12 AM	#3
BW Senior Member Join Date: Jul 2011 Posts: 259	Re: 1965 Mustang signal lights Do your four ways work?

02-25-2024, 11:30 AM	#4
wkvasnicka Member Join Date: Jun 2013 Location: Virginia Posts: 31	Re: 1965 Mustang signal lights New bulbs and four way flashers work fine. Left signal lights burn brightly but will not flash. Right ones work just fine. Still a mystery.

02-25-2024, 12:01 PM	#5
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,478	Re: 1965 Mustang signal lights Just a thought but just a few years ago, CHI-COM 1157 BULBS SLOPPY COPIES were coming in. The two contact on the bottom of the bulbs would not make full contact with the lamp socket. Swap bulbs around. It has been been mentioned previously, but a bad turn signal switch can give the same results. Have you tried checking socket continuity with a test light? __________________ *** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

02-25-2024, 03:49 PM	#6
miker98038 Senior Member Join Date: Mar 2013 Location: Kent, WA. Tucson, AZ Posts: 1,398	Re: 1965 Mustang signal lights Sponsored Links (Register now to hide all advertisements) If you have to get far into the wiring, this is the best diagram I ever found. I’m old, I bought the big one. Can also find on Amazon, but I didn’t compare pricing https://classiccarwiring.com/

02-25-2024, 07:16 PM	#7
oldbugger Senior Member Join Date: May 2010 Location: Holland Mi Posts: 642	Re: 1965 Mustang signal lights Do your brake lights work

02-26-2024, 09:15 AM	#8
BW Senior Member Join Date: Jul 2011 Posts: 259	Re: 1965 Mustang signal lights The first thing I would do is, rule out the flasher. Even if it works on the right side. Your car has two flashers turn signals and four way, flip them. The turn signal is on the drivers side air vent and the four way is near the glove box. One more thing are you using any led bulbs?

02-26-2024, 03:11 PM	#9
BW Senior Member Join Date: Jul 2011 Posts: 259	Re: 1965 Mustang signal lights If the indicator bulb is led that would be your problem. Last edited by BW; 02-28-2024 at 07:57 AM.

02-27-2024, 05:15 PM	#10
frank long island Senior Member Join Date: May 2010 Location: westbury ny Posts: 854	Re: 1965 Mustang signal lights Did you check your ground

02-28-2024, 08:06 AM	#11
BW Senior Member Join Date: Jul 2011 Posts: 259	Re: 1965 Mustang signal lights If your car is a GT that would change my earlier reply on the indicator, because you have two.