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fuel pump relay 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 sccole New User Sep 20, 2012, 1:32 PM Post #1 of 4 (1952 views) fuel pump relay Sign In I have a GMC 1500 pickup and I am having problems with the battery going dead after about 12 to 18 hrs if not being used, I have checked all the obvious things and did find the fuel pump relay was put in backwards, could this be the cause of my battery going dead? Hammer Time Ultimate Carjunky / Moderator Sep 20, 2012, 1:35 PM Post #2 of 4 (1948 views) Re: fuel pump relay Sign In No......... There is a procedure for finding a battery draw like that. You will need a digital ammeter and a jumper wire with clips on the ends to do this. First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 10 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. sccole New User Sep 20, 2012, 1:44 PM Post #3 of 4 (1933 views) Re: fuel pump relay Sign In Thanks, I just read that precedure in a previous post before I posted, I was hoping the relay was my problem, I will will post back when I find it. Hammer Time Ultimate Carjunky / Moderator Sep 20, 2012, 2:07 PM Post #4 of 4 (1920 views) Re: fuel pump relay Sign In Those 4 pin GM relays are reversible. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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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