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Rear light short Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical Ken001 New User Nov 20, 2009, 4:45 AM Post #1 of 4 (1115 views) Rear light short Sign In Rennult Magane, we have all seen yet seldom to ourselves, when following a car, any make or model, when lights are on and indicating and stopping, a fault appears, dimmimg and flashing all one side of light, dose not happen when main lights are off. First time in 20 yrs it has happened to me. It is not, foot brake switch, all wires in rear are or appear to be ok. I am at a loss,, plzz,, any idear's, some one must have experianced it. Hammer Time Ultimate Carjunky / Moderator Nov 20, 2009, 6:00 AM Post #2 of 4 (1108 views) Re: Rear light short Sign In That would likely be a ground problem with the light that is going off. The problem could be right in the bulb socket or further down the wiring but that light has insufficient ground. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. DanD Veteran / Moderator Nov 20, 2009, 6:07 AM Post #3 of 4 (1104 views) Re: Rear light short Sign In Sounds like the light circuit for that/those light sockets have lost their dedicated ground? What might be happening is that when the tail/headlights are off and the brake or signal is on. The circuit is finding ground through the taillight circuit; through the duel filament of the bulb; back feeding to the headlight switch; allowing the bulb to light. When you turn on the headlights; which supplies power to that portion of the circuit; the two powers cancel each other out and turns off all the lights. To confirm this, have all the bulbs installed in their sockets; turn on both or all three (brake tail & turn) lights. Now with one end of a jumper wire connected to a known good ground; touch the side of the light bulb’s metal base, with the other end of the jumper. If the bulb lights that’s the problem, lack of ground for that circuit. Dan. Canadian "EH" Loren Champlain Sr Veteran / Moderator Nov 20, 2009, 6:36 PM Post #4 of 4 (1094 views) Re: Rear light short Sign In Ground= Earth. Loren SW Washington   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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