Question about 1992 Acura Vigor

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What are grounds

Brake lights want work

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Most car mfg use the car chassis as a "ground" (saves wire) a simple voltage tester from about any autoparrts store cost's less than ten bucks , grounding the black wire from tester on any clean non painted metal surface on car can be used to follow the wires to the taillights so any breaks in wire can be found, also perfect for testing fuses and also light bulbs just by sticking pointed end of tester into lamp socket having someone hold break pedal down works well

Posted on May 14, 2014

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Posted on Jan 02, 2017

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I have a 2001 Chevy Silverado and my brake light hitch cover isn't lighting up when I hit the brakes. The 4 pole connector is hot(getting power) but the brake light cover isn't lighting up when I hit the...


Check connection and ground. Since the brake light pin on your wiring harness has power, check that the wiring harness ground pin has zero ohms to ground. If the harness is good and the hitch light works on a battery, then there is either a bad connection from the pin to the hitch light or from hitch light to ground.

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Could be a bad ground in the brake wiring. If you make a ground from the socket to the frame or body, see if the lights work.

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1993 chevy silverado parking lamps go of when i turn on headlights, signal lights flicker when i press on brake.


Yes I would look for a ground circuit problem. I would look at the ground wires for the headlights first. Even run a new ground wire for the tail lights to see if it helps.
Could be a ground connection for the body to frame or body to battery.

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Drive side brake light works when headlights are off ,but when headlights are on,it doesnt,wondering what is causing this?


There is a bad ground in your tail lamps. The brake light works with the headlamps off because the brake lamps have a good ground. When you turn on your running lights with the bad ground, they try to ground through the brake lamp circuit.

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The brake light and signal light on the rear right side do not work when the brake is pressed or the signal light is engadged... the lights themselves are in working order ... could this be a wiring...


Check the ground wire.The bulb has 2 filaments in it,one for the signal,and the other for the brake.If the ground wire is broken neither will work.ground a test light and check the two hot wires and see if it lights the test light,if it does,there is an open ground.ground the bulb on that side to the vehicle and see if it works.

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Brake light, reverse light and turn signal issues


Hello. The symptoms you are describing are likely due to a poor ground. Temporarily install a new ground wire by securing a piece of copper wire to the frame with a self tapping screw. Use this ground wire along with the hot wire to see if each of these lights works. If it does, trace the ground wire back to the frame, unscrew it and clean up the metal with emery cloth so you reestablish a good ground.

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1 Answer

When brakes are applied parking and dash board lights come on.when headlights are on,brake lights and tail lights do not work.very first symptom was an intermittent tail or brake light out indicator...


you might have an open ground wire on your brake/tail lights .. when you apply the brakes then power would flow thru the brake light (not see ground) so would then provide power backwards thru the parking light (common ground open) to all the other things connected to the parking lights .. like the other parking lights and dash ... when you turn power on to those things (headlights on) then there is 12 volts on both sides of the light .. thats why the lights quit working ... if the missing ground is the problem then most of the lights that are improperly turning on should be at a lowered brightness level.. interesting problem .. its also possible to have a brake light bulb that has the common ground open inside or not making connection with its socket .. i would start by removing the brake lamps and see if the problem goes away .. if it does look for a broken ground or damaged lamp ..

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1992 Nissan 300zx Brake lights don't work


Need to check around for bad grounds,look around for loose wires.

Jun 22, 2009 | 1993 Nissan 300ZX

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it sounds like a bad ground .try pulling out the light and check the ground make sure there is a good ground.

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back feed causing the brake light to ground off of the head lights caused by bad ground or possible short

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