Question about 2001 Pontiac Montana

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Left turn signal blinks rapidly when headlights are on. Both turn signals light up when brakes applied and headlights on. Blinking of turn signal slows down upon acceleration

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The blinkers have a bad earth somewhere, check the earth connections on rear lights first

Posted on Jul 22, 2009

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Why only left turning signal not blinking only when headlights on? green arrow pointing left seen but not blinking. When headlights off, both turning signals work perfectly,


It sounds as though you have a wiring problem around that particular light/signal.

Check the black earth leads to the light and the signal - it may be nothing more than a 'bad earth' due to corrosion where the earth wire connects to metal.

Check the main power wires, too. It should be an easy fix .. make sure the wires are clean and secure

Apr 16, 2017 | Cars & Trucks

1 Answer

Third eye works no rear signal or brake lights


The high mount brake light gets its own signal from the brake light switch (on the brake pedal). Or at least the wire leaving the brake light switch will splice, one wire to the high mount brake light, and the other for the rear brake lights is routed through the turn signal switch, and coordinated there with the turn signal wires to the rear brake lights. The brake wires and turn signal wires share the same wire, and same filament in the bulbs. It is kind of complicated, but brakes applied with no turn signal, brake light wire goes from brake light switch through the turn switch and out to the bulbs. If brakes applied with turning signal, non blinking brake light wire goes from turn switch to rear light, while the turning signal wire will go through the flasher relay, and then to the rear light to cause blinking.

I hope that makes sense. It appears the problem may be in the turn signal switch for both the turn signals and the rear brake lights.

Mar 14, 2015 | 2007 Dodge Ram 3500 Quad Cab Laramie

1 Answer

Problem with turn signal when headlight is on


this sounds like a earthing problem , so check the wiring for the head lights, see if any wires are trapped between something, bare wire touching car body , anythingthat doesn't look correct, could also be the indicator lever itself with a problem , but check the headlight wiring first

Jun 03, 2017 | 2002 Chevrolet Express

1 Answer

When I have my headlights on my turn signal blinks rapidly and when I hit my brakes the turn signal stops altogether. Tonight I went out and I have no reverse lights when I hit the turn signal, both sides...


check the ground on the signal lamp. If the signal blinks rapidly that indicates an overload condition. a bad conection can cause and overload as the circuit tries to overcome the unkown resistance.

Apr 18, 2011 | 2005 Ford F-150

1 Answer

Jaguar xj6 break light cancels signal


Replace the turn signal switch. Bad contact inside causing a crossing of the circuits. When the turn signal is applied it should open the brake light circuit allowing for just the signal to work. Doesn't sound like the switch is doing it's job.

May 23, 2010 | 1989 Jaguar Vanden Plas

1 Answer

Signal light only blinks 3x when headlights are on and brake pressed.


sounds like the turn signal cam could be worn im sure you headlights and turn signals are on the same knob by the sounds of it

May 10, 2009 | 2003 Chevrolet Cavalier

2 Answers

Fast Blinker


Usually a fast turn signal means that there is a light out. You should probably check all of your lights, including back-up lights, and turn signals. If there is one out then replacing the burnt out bulb should fix the problem.

May 10, 2017 | 1997 Jeep Grand Cherokee

2 Answers

Left Turn Signal Rapidly Blinks


Sounds to me like a bad ground. When the current can't complete through a ground circit it feeds back through the elements ancd can cause all sorts of wierd syptoms.

The fast blink itself can be casued by a burnt out bulb I would check that first.

Then I would check the trailter harness if there is one and unpluch any harness that may be plugged into it. also check each bulb to see if it is seated well. you may be able to see if there is corrorsionaround the bulb terminals at this time is so yo may need to replace the light assembly. Also you could look for any spot where maybe someone in the past tried to tie into the harness to hook up additional lights etc. this may allo moisture in and corroded to the point the wire is "open"

Apr 06, 2009 | 2002 Chevrolet Venture Passanger

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