Question about 2004 Infiniti Q45

1 Answer

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??????

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 541 Answers

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

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Car won't start without a jump sometimes,could it be that key not registered in computer, 1996 infinity q45

I'd check out the battery's charge status, the battery terminal connections, and then the alternator. You can have both tested for free at any Autozone. I doubt it's your key causing the problem.

Nov 23, 2016 | Infiniti Q45 Cars & Trucks


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 ??.


on Feb 01, 2015 | Cars & Trucks

1 Answer

1996 infinity q45 keeps losing charge but battery/alternator/passes check test

You probably have something draining the battery, such as a glove box or trunk light that is not turning off, or something else that is drawing current.

To test for a current draw, you can install a test light or current meter in series with the positive battery cable then remove fuses one at a time to see which circuit causes the current draw to decrease noticeably.

Nov 21, 2016 | Infiniti Q45 Cars & Trucks

1 Answer

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

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 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

Not finding what you are looking for?
2004 Infiniti Q45 Logo

182 people viewed this question

Ask a Question

Usually answered in minutes!

Top Infiniti Experts


Level 3 Expert

70365 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

13554 Answers

Are you an Infiniti Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides