Question about 1991 Volkswagen Corrado

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Wire help when i apply brakes the front marker lights come on

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You have a poor earth on your brake light circuit,when you put your foot on the brakes some of the power is going to your side lights,check the earth on your rear light clusters

Posted on Oct 19, 2008

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Posted on Jan 02, 2017

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I'm needing the wiring diagram for my 2007 Chevrolet Impala LT 3.5 tail lights.


Go to http://www.bbbind.com/free_tsb.html free wiring diagrams ! You having tail light problems ? Do you know how they work ?

They are turned on by the BCM !
Park, Tail, Marker and License Lamps
The park, tail, license, and marker lamps are turned ON when the headlamp switch is placed in either the HEAD or PARK lamp positions, or anytime the automatic light control (ALC) turns the headlamps ON. When the headlamp switch is placed in the park lamp or headlamp positions, ground from G202 is applied through the signal circuit to the BCM indicating the park lamp request. In response to this signal, the BCM applies ground through the park lamp relay control circuit energizing the PARK LP PCB Relay. With the relay energized, battery voltage is applied through the switch side of the relay, both park lamp fuses, and the supply voltage circuits illuminating the park, tail marker, and license lamps. Ground for the left front park and marker lamps is provided at G101 and the right front park and marker lamps at G100. Ground for all rear lamps is provided at G302.
Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
?€¢
G101 provides ground for the left front turn signal lamp


?€¢
G100 provides ground for the right front turn signal lamp


?€¢
G302 provides ground for the left and right rear turn signal lamps

May 03, 2016 | 2007 Chevrolet Chevrolet Impala LT

1 Answer

My 83 honda shadow has head light tail light and front markers but turn signals dont flash no brake light fan or horn or back markers what can i be they worked 2 weeks ago when i rode it last


It almost has to be a fuse or broken wire to the fuse. Check power to the flasher.
There are places on line to get free Honda Shadow manuals. I have a '96 Shadow.
Hope this helps.

Hope this helps.

Mar 29, 2015 | Honda Cars & Trucks

2 Answers

Rear parking light goes out when brake pedal depressed


You probably have a poor earth on a rear light cluster, if you can find the earth wire ( often goes to the body close to the lamp) that will be the problem and it will need cleaning or a new terminal putting on.

Nov 22, 2017 | 2000 Jeep Grand Cherokee

1 Answer

2002 TrailBlazer side marker lights blink with 4ways


I think you either have a defective bulb socket or you still have a ground problem, that is the only thing that can cause this, the ground issue may be caused by the turn signal switch as well.

Apr 12, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

1993 Honda accord EX no brake lights


This sounds like Brake Light Switch, can be found at any local parts store, for under $15 and easy enough to replace. The switch is located under the brake pedal and depresses when you hit the brakes, causing the brake lights to turn on. Replacing this is cheap and easy.

May 10, 2012 | 1993 Honda Accord

1 Answer

I have a 99 Pontiac Sunfire, 2.2L and my turn signals quit working. I replaced the combination switch and the flasher/hazard relay, and still no joy. The problem was intermittent, and now it's just dead....


It will turn on when I hit the button and the turn signals do work. All of this has led to my ABS lights to come on as well. ??????????? Your best bet , take it to a qualified repair shop or learn to do better explanation's ! Or lean to do automotive electrical testing .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Electric Testing Techniques You Need to Know

How to Use Multimeter to Troubleshoot Common Problems

Do you know what a wiring diagram is ? How to use a DVOM - digital volt ohm meter ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year make ,model and engine size. Under system click on lighting ,then under subsystem click on turn signals . Click the search button then the blue links .Check power an ground circuits ! This is how we diagnose electrical faults , not just replacing parts .

Turn Lamps
Voltage is applied through the TURN fuse and the turn/hazard flasher when the ignition switch is in the following positions:
• RUN
• BULB TEST
• START
The voltage travels to the contact in the hazard switch. The hazard switch is located in the turn/hazard-headlamp switch assembly. This contact is normally closed.
When the left turn signal is turned on, voltage is applied to the following components.
• The left turn indicator
• The left front park/turn lamp circuit 14
• The left rear turn lamp circuit 18
The turn lamps turn on immediately. The current flow heats up the timing element. The timing element is located in the turn/hazard flasher. The timing element repeatedly opens and closes the circuit. This action causes the turn lamps to begin flashing.
The voltage that is applied to the left front park/turn lamp is also applied to the left front marker lamp. If the headlamp switch is in the OFF position, the left front marker lamp will find a path to ground through one of the following lamps. The following lamps provide low resistance paths to ground:
• The right front marker lamp
• The right turn indicator
• The right front park/turn lamps
• The left front park/turn lamps
The left front marker lamp flashes with the turn lamps. The voltage drop across the marker lamp is much higher than the voltage drop across the other lamps. The lamps that are used for the ground path will not flash.
When the headlamp switch is in either the PARK or HEAD positions, voltage is applied through the following components:
• The EXT LP fuse
• The marker lamps
• The park lamps
When the left turn signal is turned on, the left marker lamp will have voltage at both connections. The left marker lamp does not light. When the turn/hazard flasher stops the voltage to the turn lamps, the marker lamp is grounded through the turn lamp. The marker lamp does not go on. The left front marker lamp flashes in the following manner:
• The left front marker lamp flashes on when the turn filament of the left front park/turn lamp goes off.
• The left front marker lamp flashes off when the turn filament of the left front park/turn lamp goes on.
Voltage is applied to the right lamps in the same manner, when the right turn signal is turned on.
Hazard Lamps
Voltage is applied at all times through the following components to the normally open contact of the hazard switch in the turn/hazard-headlamp switch assembly:
• The STOP HAZ fuse
• The turn/hazard flasher
When the hazard switch is turned on, voltage is applied to the following components:
• The front turn lamps
• The rear turn lamps
The following lamps flash on and off:
• All of the turn lamps
• Both of the turn indicators
The front marker lamps flash with the hazard lamps on, just as the front marker lamps flash when the turn lamps are on. If the headlamp switch is in the OFF position, the front marker lamps flash on when the hazard lamps are on. The front marker lights will flash on when the hazard lamps are on if the headlamp switch is in one of the following positions:
• PARK
• HEAD
When the hazard lamps are on, the following conditions apply:
• The turn circuit is always open.
• The turn/hazard flasher controls the lamp.
Park/Marker Lamps
Voltage is applied through the EXT LP fuse, to the headlamp switch at all times. Voltage is applied to the park lamps and the marker lamps when the headlamp switch is in the following positions:
• PARK
• HEAD
The front marker lamps are grounded through the turn filament of the respective front park/turn lamp. The front marker lamps light as a result.
Stop Lamps
Voltage is applied through the STOP HAZ fuse to the brake switch at all times. When the brake pedal is depressed, the brake switch closes. This action applies voltage through the turn/hazard-headlamp switch assembly to the following lamps:
• The high mounted stop lamp assembly
• The left tail/stop-turn lamps
• The right tail/stop-turn lamps


Jun 30, 2017 | 1999 Pontiac Sunfire

1 Answer

What would cause the side maker lites to lite when brake applied


Look for a missing or poor ground connection on the rear stoplight lampsocket/s.

Sep 07, 2009 | 1995 Mazda Protege

1 Answer

2006 chevy silverado 1500 front brakes are squeeking


on disc brakes there is a metal marker on them that when the pads get low on material it will make a squeeling noise to let you know its time to change the pads.. so I would say you are in need of front pads also even though they look good you are getting low.. this marker is designed to let you know its time before you get to metal to metal .. jerry

Apr 30, 2009 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

No headlights when turned on


Just a thought. I have a 98 626 5 speed. When the hand brake is applied the head lights go out but the marker lights stay on. Might be a switch issue with the hand brake...worth a look. The sensor should be located at the pivot point for the brake handle.

Feb 02, 2009 | 1998 Mazda 626

1 Answer

2004 Honda civic has lighting issues: Pressing the brake pedal the front marker lights turn on and so do the dash lights as well as the rear brake lights. When the column light switch is turned on, the...


You have a bad ground somwhere. You need to check and look for broken wires or corroded connections. A good manual with a wiring diagram helps with this.

Nov 26, 2008 | Honda Civic Cars & Trucks

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