Question about 1992 Ford F150 SuperCab

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Something is draining the battery overnight, had alternator & battery checked both good any ideas what the problem counld be

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GET AN AMMETER AND ATTACH BEETWEEN THE RED (PLUS) + OF THE BATTERY AND STARTER CHECK AND READING OF AMMETER AND RECORD THE READING THEN PULL EACH FUSE ONE BY ONE UNTIL YOU ONLY HAVE LESS THEN HALF AMP .THEN YOU WILL KNOW WHAT CIRCUT IS CAUSEING THE PROBLEM. THEN YOU CHECK THE SWITCH BY DISCONNECTING FROM LUM IF KNOT CHECK THE RELAY BY PUTTING IN THE FUSE AND OUT AND HEAR THE CLICKING ON AND OFF. FAILING ALL THAT IT HAS TOBE THE ITEM E.G. RADIO MODUEL ECT, ECT

Posted on Jun 29, 2009

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1 Answer

Battery keeps drainging


Try disconnecting the alternator leads overnight but make sure they are kept away from the body, the big cable is always HOT. See if that does it overnight. If its OK then the alts duff. If not then get a small tester / amp meter set up and connect it between the neg post and the neg lead. This will give you some idea of the drain in amps. With the car locked as normal remove and replace the fuses to lights,door locks etc until the ammeter suddenly reads zero. Then you have an idea of which item is draining it. Door locks are an old favourite after the alternator. Alternators can back drain a batt even if they show a charge when running. Get a pal with electrical knowledge to help.

Nov 01, 2015 | Cars & Trucks

1 Answer

New alternator,battery, starter but battery dies overnight and hard too boost shop tested battery and alternator both check good???


If a good battery is losing charge overnight then it is probably being drained by something left on! The usual areas to look at would be the boot light or glovebox light, check these or anything that might be staying on when the ignition is turned off!

Feb 16, 2015 | Cars & Trucks

1 Answer

Why does catera starts and runs great than other times won't even turn over and we have to jump. checked alternator-good battery-good ?


Check that all your ground wires are well attached and attaching points are clean and free of corrosion. Also check for parasitic drains such as an underhood light, trunk light, map light, floor lights, something plugged into dc outlet like a cell phone charger left plugged in, etc. is not draining your battery overnight or over time when parked.

Jul 30, 2014 | 2001 Cadillac Catera

2 Answers

My car battery keeps getting drained. what is draining my battery.


Are you sure that you have a problem with something draining the battery, or do you have a problem with the alternator not charging the battery? I would have the alternator tested to make sure of that before spending hours and hours troubleshooting electrical problems.

Basically, to check a problem like this you will need a clamp on amp meter. Then you pull fuses from your fuse panel and see where the drain is. Make sure you have a good layout of your fuse panel and fuse sizes (a digital photo is also a good idea) before starting, so you don't introduce problems.

Jun 26, 2011 | 2000 Volkswagen Jetta TDI

2 Answers

Light on dash reads "check


nancycmixon, When you see this "check your charging system" you need to have the alternator checked. This is the main component for the charging system. A normal alternator will put out 13.6 to 14.6 volts. A few tenths of a volt either way won't mean too much but if they are extremely over or under these values means you have a bad alternator. I believe that your vehicle has a voltage meter in the dashboard and it will usually read in the thirteen to fourteen volts range. As far as your battery losing its charge overnight means that you have another problem and that is you have what is called a parasitic drain. There are a certain amount of parasitic drains already in the car with the radio memory and maybe a clock that constantly displays the time and the antitheft system in the car. These will not drain your battery overnight. You have something else draining your battery that is your problem. Have the alternator checked and mention the battery drain. There is test for this but it is too lengthy to post here. Sorry about that. Good luck with this.

May 13, 2011 | 2005 Ford Taurus

2 Answers

My battery keeps draining down at night it's a 99 dodge durango


you have something draining the battery,check for any lights that might be staying on,interior light,stop light under the hood light(if any),glove box light trunk light, if you have a multimeter with amp testing capability or an amp meter you can check where the drain is by removing each fuse & put the probes on each side the terminals until you find a drainage,that way you might be able to find out what is draining the power & rectify it......hope this helps......cheers

Jul 28, 2010 | 1999 Dodge Durango

1 Answer

Battery drains overnight.


Alternator. The regular inside the alternator has an open diode. Disconnect the battery overnight and it will start the next morning. The alternator will need to be replaced to fix the problem.

Dec 22, 2009 | Cadillac Fleetwood Cars & Trucks

3 Answers

Something is draining my battery


you need a mech you have a draw whitch meeans something is on at all times or internal short on something or pass bad batt.
make sure things ore off like dome light trunk light cig lighter out of socket cell phone charger etc. good luck

Aug 30, 2009 | 1997 Chevrolet Cavalier

1 Answer

Problem with loosing charge on battery it seems that the alternator is draining it. have replaced both and the same problem. have also checked all other connections on the motor and still no luck. any


is voltage at battery when engine running and headlights on around 13.5-14volts?
if so its not the alternator
do a current draw test with amp gauge in system with everything off 0.02-0.05amp good any more than an amp will drain battery over night something staying powered up or a short can cause this

May 30, 2009 | 1989 Ford Ranger

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