Question about 2000 Jeep Grand Cherokee

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My brake lights don't work when my Head lights are on.

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It sounds like a bad earth connection in the vehicle rear wiring loom. Check the earth wire that runs from the globe sockets in the light units and any connectors in the wiring loom near the light assemblies as well as where the earth wire is attached to the body. If necessary, remove, clean thoroughly by removing any corrosion or paint and re-attach securely.

Posted on Sep 29, 2010

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My brake lights don't work but all other lights do


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The marker lights, brake lights,dash lights,power windows,power locks,radio and heater dont work


When you release the brake pedal, there is a switch underneath the brake pedal that disconnects the circuit to your brake lights causing your brake lights to switch off. Sometimes this brake light switch will go bad and need replacement. If your brake light stays on after you turn your car or truck off and you don't want to run your battery down, you may be able to get down underneath the brake pedal and manually pull up on the brake light switch to deactivate it until you can get it repaired.
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No turn signals, 1 driver brake light bad, ABS light on. 2002/2003 CVPI


Sounds like you have 'ground' issues. Apply the brakes using a broom stick or more apropriate tool so that the brake lights are activated. Then go to the brake light that is not bright enough. using a test-light with a sharp pointed probe, poke the ground wire close to the bulb (usually a black wire) make sure the test light is attached to a grounded bolt. if the brake light gets brighter with ground added, you need a new ground wire. Splice it in to the existing wire & attach it to a bolt. Lights should work better with proper ground. (each bulb has a positive post & neg. post, don't add ground to the side with power coming through it from Battery (+)(red light on test light) - probe wires FIRST with test light to find (+) POS. Hot wire, and leave that one alone.

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When I turn my lights on my tail lights work but when I hit my brakes the don't light up I have a 2001 vw beetle????


the brake lights don't light up or the taillights don't light up? the brake lights are brighter than the tailights so the tailights won't show up whenbrakes are applied. if no lights work when brakes are applied then check for a bad ground at the light assembly.

Jun 14, 2012 | 2001 Volkswagen Beetle

1 Answer

I have a 99 Jeep Cherokee limited and when I turn my lights on my tails don't work but when I apply the brakes the passenger side comes on. I replaced blubs and sockets.


Had a similar problem in mine. When I applied brakes while head lights were on, the the light would go off completely. There is a computer chip in the tail light assembly that tends to go bad causing the light to malfunction. I just bought a new tail light assembly from eBay and now it works perfectly. As easy as putting in a new bulb but you just have to unplug electric terminal from the light and plug in new light once received.

Oct 26, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Unknown dash warning light. Almost full yellow circle with arrow head at one end. Anticlockwise direction. Open at the bottom. Exclamation mark in the centre.


It's similar, but not identical to the standard brake warning light (these usually have two circling arrows, one on each side). Check your brakes. The park brake may be on, or there is a fault in the brake system.

I think it's time for a rule requiring warning indicators to have a printed label as well as an icon. Too many people have trouble figuring out the hieroglyphics, especially when they don't follow a standard. Even if you don't read the language, you can look up the word on Babelfish. You can't do that with an icon.

Jun 13, 2011 | Volkswagen Passat Cars & Trucks

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