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Search Auto Parts Search Dim headlights and dash Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical 78merc User Jul 1, 2014, 4:18 PM Post #1 of 3 (1267 views) Dim headlights and dash Sign In Hello. I haven't posted in a while but have always got great advice on this sight. I have a 1978 Grand Marquis and the dash lights and headlights seem dim. Over the winter my battery went dead. I charged it up and had the alternator and battery checked by an auto parts store. They checked fine. The battery connections are tight and corrosion free. Any idea what could be wrong? Any help would be appreciated. Thanks!!!!!!! nickwarner Veteran / Moderator Jul 1, 2014, 7:08 PM Post #2 of 3 (1246 views) Re: Dim headlights and dash Sign In Check the voltage at the headlight. Also look inside the headlight plug. They weren't sealed up from weather back then and the spade connectors can get corroded up enough that they work but are dim. Tom Greenleaf Ultimate Carjunky / Moderator Jul 1, 2014, 8:19 PM Post #3 of 3 (1242 views) Re: Dim headlights and dash Sign In ? Dash lights too? Check voltage while running along with headlight connections and other battery connections. I think this has a voltage regulator that might be on firewall for alternator - check the plug to it especially since alternator checked fine. Fiddle with headlight knob too both on and off and the dimming feature for dash lights as those get a dull or dead spot sometimes. It's old, think WD-40 on all these things and don't forget door hinges, lock and latches everywhere even the glove box all are a pain to find dinky little junk that breaks for the sake of a little lube now and then, T (This post was edited by Tom Greenleaf on Jul 1, 2014, 8:23 PM)   Email This Post   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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