Electrical problem, turn signal feedback
Thread Starter
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From: Camp Verde AZ
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' 72, Electrical problem, turn signal feedback
1972,
Suddenly got no turn signals, but both arrow indicators on the dash light up when the brake pedal is pressed. Brake lights in back work OK.
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Suddenly got no turn signals, but both arrow indicators on the dash light up when the brake pedal is pressed. Brake lights in back work OK.
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Last edited by AZDoug; Aug 5, 2018 at 04:40 PM.
Pro
Joined: Nov 2016
Posts: 729
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From: Kelowna British Columbia
Suddenly got no turn signals, but both arrow indicators on the dash light up when the brake pedal is pressed. Brake lights in back work OK.
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
IIRC, the turn signal flasher is on the pass side towards the kick panel under the dash? I can't hear it clicking, so I can't find it that way...
I can't see why both dash arrows light up when the brake pedal is pressed if it is flasher problem. i know the bulbs are good, otehr wise I wouldn't have brake lights in back.
Thanks,
Doug
Pro
Joined: Nov 2016
Posts: 729
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From: Kelowna British Columbia
electrical
'72, sorry about that.
IIRC, the turn signal flasher is on the pass side towards the kick panel under the dash? I can't hear it clicking, so I can't find it that way...
I can't see why both dash arrows light up when the brake pedal is pressed if it is flasher problem. i know the bulbs are good, otehr wise I wouldn't have brake lights in back.
Thanks,
Doug
IIRC, the turn signal flasher is on the pass side towards the kick panel under the dash? I can't hear it clicking, so I can't find it that way...
I can't see why both dash arrows light up when the brake pedal is pressed if it is flasher problem. i know the bulbs are good, otehr wise I wouldn't have brake lights in back.
Thanks,
Doug
Other source is the large steering column connector at bottom of column. Make sure it is mated and together. Also you can use test l;ight here and see what you are getting on turn signal wires.
Le Mans Master
Joined: May 2003
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From: Fernandina Beach FL
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'72, sorry about that.
IIRC, the turn signal flasher is on the pass side towards the kick panel under the dash? I can't hear it clicking, so I can't find it that way...
I can't see why both dash arrows light up when the brake pedal is pressed if it is flasher problem. i know the bulbs are good, otherwise I wouldn't have brake lights in back.
Thanks,
Doug
IIRC, the turn signal flasher is on the pass side towards the kick panel under the dash? I can't hear it clicking, so I can't find it that way...
I can't see why both dash arrows light up when the brake pedal is pressed if it is flasher problem. i know the bulbs are good, otherwise I wouldn't have brake lights in back.
Thanks,
Doug
Sounds like you are missing a ground on the rear of your car. The flasher only works when current is pulled through it- no ground- or too much resistance to ground -it won't work.
If you have no ground-when you hit the brake lights- it finds one through the turn signal filament in the back then travels all the through to the dash lights and uses the ground in your dash.
Electricity not only follows the path to least resistance- but ALL paths!!!
Thread Starter
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Bad grounds have caused feedback probs for me in other cars over the decades. I assume there is a common harness ground in back, somewhere? I will have to get the car on a lift, most likely.
Doug
Doug
Le Mans Master
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Thread Starter
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From: Lexington, NC
1972,
Suddenly got no turn signals, but both arrow indicators on the dash light up when the brake pedal is pressed. Brake lights in back work OK.
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Suddenly got no turn signals, but both arrow indicators on the dash light up when the brake pedal is pressed. Brake lights in back work OK.
Where should I start to look for the problem? Would it be in the turn signal switch, or the ignition switch, or steering column wiring in general?
Thanks,
Doug
Last edited by walt4805; Aug 6, 2018 at 05:48 PM.
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Stuff like this happens when the GF drives the car....
But, at least now I know the 4 way flasher is bad.
Side note: I had a '66 Impala SS 427 with TH400 back, oh, 1974-'79, and the dash lights went wonkers (dash lights went dark, turn arrows lit up). This car had that laminates circuit board type wiring panel, and the connector that plugged into it could be wiggled to make the dash lights come on as normal. probably some sort of bad ground back then too, but i got rid of the car when I graduated from college in '79. I kept the '61 Corvette, but the Impala had to go as moving it 1500 miles would have been a problem. Right about the second gas crisis time, I got $400 for the car., never wrecked, no rust, 80K miles, nobody wanted big motors. Ah, well..
Doug
But, at least now I know the 4 way flasher is bad.Side note: I had a '66 Impala SS 427 with TH400 back, oh, 1974-'79, and the dash lights went wonkers (dash lights went dark, turn arrows lit up). This car had that laminates circuit board type wiring panel, and the connector that plugged into it could be wiggled to make the dash lights come on as normal. probably some sort of bad ground back then too, but i got rid of the car when I graduated from college in '79. I kept the '61 Corvette, but the Impala had to go as moving it 1500 miles would have been a problem. Right about the second gas crisis time, I got $400 for the car., never wrecked, no rust, 80K miles, nobody wanted big motors. Ah, well..
Doug