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Headlight plug hot both terminals? 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 madijack New User Oct 6, 2010, 8:33 AM Post #1 of 5 (3763 views) Headlight plug hot both terminals? Sign In 97 Acura 2.2CL 156k - Driver headlight out - stopped working out of the blue - pulled bulb / swapped bulb into passenger side - bulb OK Bulb from passenger side into driver side - no go Checked fuses / swapped fuses - all OK Checked voltage at plug connector at headlights - passenger side (working) - 14.3 V on one pin / 0 V on other drivers side (not working) - 14.3 V on BOTH pins How could this be? Thanks for any idea of what to check next - signed, daughters' full time mechanic Hammer Time Ultimate Carjunky / Moderator Oct 6, 2010, 8:41 AM Post #2 of 5 (3755 views) Re: Headlight plug hot both terminals? Sign In The reason your seeing voltage on both sides is because you have no ground and your reading it while it's plugged in. Does the power go off with the switch? Are you having the same problem on both high and low beam? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. madijack New User Oct 6, 2010, 9:34 PM Post #3 of 5 (3746 views) Re: Headlight plug hot both terminals? Sign In Hammer Time - thanks for the help I am reading it at the plug AFTER pulling the bulb no power with switch off - high and low same reading - madijack New User Oct 8, 2010, 5:29 PM Post #4 of 5 (3732 views) Re: Headlight plug hot both terminals? Sign In Anyone? So I take it I should have one hot and one ground on the plug pins...... How would the ground get hot? My simpleton brain says the ground goes to .........well, ground......the frame, etc. How do I go about chasing it down? The wire disappears pretty quickly into a loom and then with other wires and out of sight........... Anyone? Thanks! Hammer Time Ultimate Carjunky / Moderator Oct 8, 2010, 5:40 PM Post #5 of 5 (3729 views) Re: Headlight plug hot both terminals? Sign In The bulbs are powered all the time. they are turned off and on with the grounds. You need to be using a testlight that reads power and ground. Here's the diagram to follow ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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.   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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