Question about 2004 Infiniti Q45

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1996 infinit q45 alternator vs battery sparking

I just purchased this automobile and everything was working properly except that the alternator was bad. I purchased a new alternator and alternator plug. After putting the alternator, alternator plug and the wires behind it back together, when I go to connect the battery the negative post sparks and the 120 A fuse that goes to the negative hookup for the alternator (in the underhood fuse panel) blows. If the ground wire to the alternator is removed, there is no spark and also no use of electricaI anything inside the car. I cannot locate a haynes manual for this car and need assistance.I have spent a week trying to fix this problem ~ any suggestions??????

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Sounds like you have reversed the wires going into the back of the alternator. Contact the dealer, or go in and have them show you which wire goes where.

Posted on Jan 23, 2009

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My 96 ford contour will turn over but will not start without a jump. O'Reillys said the alternator is good. All the fuses are good. What could be the issue? Please help


Does the battery have a full charge, battery connections all clean and tight?
With engine cranking, the vehicle systems get battery voltage. With engine running, it gets alternator voltage, there can be several volt difference.
With everything off use digital multimeter across battery posts, the generic spec for a full charge is 12.6 volts. Leave the leads on the battery posts, have a helper crank it, the voltage shouldn't drop below 9.6 volts, that is a generic spec.
The next test, w/o jumpers, have a helper crank it while you check spark at the plugs--check proper fuel pressure and fuel injector pulse. Any applicable trouble codes?

Oct 09, 2016 | 1996 Ford Contour

Tip

Automobile battery and charging system



Most automobile batteries are lead acid which should have a standing voltage of about 12.6V fully charged at 70 degrees F. To test a battery first it must be fully charged. If fully charged a good battery will stay above 9.5V while cranking engine. Most part stores will charge and test batteries, starters and alternators. To be sure your alternator is properly charging start the engine and turn on the headlights and blower fan to add electrical load. Voltage should be over 13.2V at idle and under 15V with a known good battery. If not check the larger wire bolted to the back of the alternator for loose connection and continuity to the battery. If ok check fuses. If all are present and check good most likely the alternator is bad and needs replacement, although it is possible on many modern automobiles to have a powertrain control module (PCM) be the problem as they serve as the voltage regulator. Most late 90s and newer GM and Chrysler do. If all else fails have a professional check it to be sure. Hopefully this will answer the questions of many. Good luck ??.

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on Feb 01, 2015 | Cars & Trucks

1 Answer

I just repaired my alternator and my battery and when i try to jump my car, the alarm system goes off. My car is a 1996 infiniti q45.


sounds like you are breaking into the car. Try placing your door key and turning it in the door lock, this should re arm the system at least it does so in a ls400. You have power it is just being routed by the computer to the wrong recipient

Jun 01, 2015 | Infiniti Cars & Trucks

1 Answer

Battery not staying charged


If this battery is in an automobile then 1 of 2 things is happening.

1.) The battery has a dead cell and needs to be replaced.
-OR-
2.) The charging sysyem on your auto is not working properly and is not charging the battery. (such as bad alternator)

Jul 30, 2012 | 1995 Cadillac DeVille

1 Answer

Car won't start


i really think your right that will be my first gess to, i'ts probablly a death spot on it try to bang it with a'n hammer or just turn your ignition switch to start your car many time fast it might turn again i did it many time and it work,if i'ts the case change it but even if it doesn't better change it....plese reply ...lipak!...

May 05, 2010 | 1997 Infiniti.5 Q45

3 Answers

Security on. car wont crank. can trun key wont


verify that you have a fully charge battery and that you have the same amount of voltage at the battery as at the starter when the key is turned to the start position. If not repair fault at positive cable either at battery or at starter. If voltage checks good. Use a remote starter and turn key to the on position and try to crank over engine with remote starter. if engine cranks over. You have a defective starter solenoid and starter must be replaced.

Mar 26, 2010 | 1997 Infiniti.5 Q45

1 Answer

My 96 infinity Q45 is very slow starting...it acts as if the battery is low ... but it does crank


Maybe the battery going out, alternator not charging correctly. Its hard to tell on less someone is there to actually look and listen to the engine. Take the vehicle to a local autozone, have them test the battery and alternator for any probblems.

Feb 08, 2010 | 1997 Infiniti.5 Q45

1 Answer

Alternator for 1998 infiniti q45


You simply disconnect the battery, and use sockets/wrench to remove the alternator. Make sure the battery is fully charged up before you install the new alternator.

Nov 10, 2009 | 1997 Infiniti.5 Q45

1 Answer

Is my altenator bad or is it the battery


It could be the alternator. Did any warning light come on? Something should have alerted you if the alternator failed.

Jul 06, 2009 | 1997 Infiniti.5 Q45

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