Very slow/ not working turn signals - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**70CHEVYBB** · 09-04-2013, 10:40 AM

I finished up installing my factory wiring harness. I noticed my turn signals blink very slow and sometimes it will take 20 or 30 seconds to start blinking. Do I have a ground that I am missing? I have a new taillight harness and have all the grounds connected to clean metal.

Lee H · 09-04-2013, 10:47 AM

Have you checked your bed to frame ground?

cdowns · 09-04-2013, 11:11 AM

each and every light bulb needs a ground in order to work

**70CHEVYBB** · 09-04-2013, 12:14 PM

I have the grounds from the headlight plugs and front marker lights to the radiator support. The rear side markers ground to the mounting screw. I do not see a ground out side the brake lights. I did not clean the tail light housing where it mounts to the bed. I do belive the wiring has its own ground? I do not have a ground from the bed to the frame. I will add one or two?

Lee H · 09-04-2013, 12:24 PM

One with 12 gage wire will be fine, you also need on from cab to frame and core support to frame. I also run a short negative battery cable from a starter bolt to the frame.

**TBONE1964** · 09-04-2013, 12:46 PM

How fast is the wiper motor. Does it go slow also? I had this problem and it was caused by low voltage. Do you have a DVOM to check battery voltage?

Another way to test the theory is to use jumper cables on the battery from another vehicle while they are both running and see if the signals flash faster.

**70CHEVYBB** · 09-04-2013, 12:59 PM

I have not been able to get the wipers going yet. I turned them on and nothing happened, I have not had time to look in to that problem yet.
looks as if I have some ground wires to install. I will try that and see what happens. Thanks, Wes

cdowns · 09-04-2013, 01:05 PM

body of light bulb to body of socket GROUND
body of socket to taillight bucket GROUND
taillight bucket to sheetmetal of bed GROUND
sheetmetal of bed to frame GROUND
frame to battery neg terminal GROUND
for best operation all should b bright and shiny metal to metal contact and for good luck and long life a smear of dielectric grease to finish it off

each and every light bulb sjhould be addressed in this manner fer the lights to work

gipper · 09-04-2013, 01:28 PM

Also, check your flasher. If that is bad, turn signals will not work.

**70CHEVYBB** · 09-04-2013, 04:16 PM

That was the first thing

09-04-2013, 10:40 AM	#1
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Very slow/ not working turn signals I finished up installing my factory wiring harness. I noticed my turn signals blink very slow and sometimes it will take 20 or 30 seconds to start blinking. Do I have a ground that I am missing? I have a new taillight harness and have all the grounds connected to clean metal.

09-04-2013, 10:47 AM	#2
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,147	Re: Very slow/ not working turn signals Have you checked your bed to frame ground? __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

09-04-2013, 11:11 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Very slow/ not working turn signals each and every light bulb needs a ground in order to work __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-04-2013, 12:14 PM	#4
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Re: Very slow/ not working turn signals I have the grounds from the headlight plugs and front marker lights to the radiator support. The rear side markers ground to the mounting screw. I do not see a ground out side the brake lights. I did not clean the tail light housing where it mounts to the bed. I do belive the wiring has its own ground? I do not have a ground from the bed to the frame. I will add one or two?

09-04-2013, 12:24 PM	#5
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,147	Re: Very slow/ not working turn signals One with 12 gage wire will be fine, you also need on from cab to frame and core support to frame. I also run a short negative battery cable from a starter bolt to the frame. __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

09-04-2013, 12:46 PM	#6
TBONE1964 Cluster King Join Date: Nov 2012 Location: Junction City, OR Posts: 5,263	Re: Very slow/ not working turn signals How fast is the wiper motor. Does it go slow also? I had this problem and it was caused by low voltage. Do you have a DVOM to check battery voltage? Another way to test the theory is to use jumper cables on the battery from another vehicle while they are both running and see if the signals flash faster.

09-04-2013, 12:59 PM	#7
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Re: Very slow/ not working turn signals I have not been able to get the wipers going yet. I turned them on and nothing happened, I have not had time to look in to that problem yet. looks as if I have some ground wires to install. I will try that and see what happens. Thanks, Wes

09-04-2013, 01:05 PM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Very slow/ not working turn signals body of light bulb to body of socket GROUND body of socket to taillight bucket GROUND taillight bucket to sheetmetal of bed GROUND sheetmetal of bed to frame GROUND frame to battery neg terminal GROUND for best operation all should b bright and shiny metal to metal contact and for good luck and long life a smear of dielectric grease to finish it off each and every light bulb sjhould be addressed in this manner fer the lights to work __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-04-2013, 01:28 PM	#9
gipper Registered User Join Date: Dec 2010 Location: Fruitport, Michigan Posts: 172	Re: Very slow/ not working turn signals Also, check your flasher. If that is bad, turn signals will not work.

09-04-2013, 04:16 PM	#10
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Re: Very slow/ not working turn signals That was the first thing



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