Question about 1987 Jaguar XJ6

1 Answer

Something electrical is draining battery on 1987 XJ6;

After replacing the battery twice and having the car completely checked out by a local Jag dealer, I still have problems with irregular starting. It runs for a short time then won't start at all. Something electrical is draining the battery. Help!!!

Posted by on

  • Woody J Hiatt May 11, 2010

    When it doesn't strart is the battery kaput?

    A simple cheap 2.99 voltmeter will tell you if the alternator is
    charging the battery around 14.4 votls and less as it charges up. Now
    there are computors that draw a small current even when you are
    not driving the car..

    Next thing is - if battery is being drained while you sleep- Remove
    a battery post ( after charging) Put a current meter in seriies
    with the removed cable and read the current draw. Start pulling fuses
    anywhere you want to and see if you find a large drop in current draw.
    See what that fuse controlled and look there for a problem.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 40 Answers

Have you checked the alternator? The alternator may not be charging the battery. With engine running, check the voltage at the battery (it should be ~14V). If it's less than that, your battery won't charge properly. You can take your alternator to auto store to have it load tested also to be sure. Sometime alternator issues don't show up until it gets hot. Defective alternators have also been known to drain the battery after the car has stopped.

Posted on May 10, 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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only 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:

2 Answers

Why does the battery run down if I don't drive the car in 3 days on 1989 jag xj6

Well, something is draining the battery. Recharge the battery, and have it load tested. If that tests okay, check for voltage draws while the car is off. Pull all fuses, test again. Alternator diodes are a common culprit and would not stop the draw with all fuses pulled. Keep going until you identify the offending system.

Feb 25, 2015 | Cars & Trucks

2 Answers

How to drain fuel from 86 Jag xj6

The best way is to take the tank out completely to clean , as you have to make sure that it is 100% clean so that the problem is solved completely.
If not cleaned properly it will make you a lot of problems

Oct 02, 2014 | 1986 Jaguar XJ6

1 Answer

Jaguar 1987 radio code reset failure

I can only advise you see the Jag dealer on this. I think you don't have the correct code and only they can check that for you in the factory data base for your car.

Sep 25, 2012 | 1987 Jaguar XJ6

1 Answer

Check engine is still on after replacing all 4 oxygen sensors on my 1995 jaguar Xj6?

I had the same problem. Had to replace the catalytic convertor. The JAG one is very expensive, but my local machanic 'built' one and it passes emissions tests and runs ok now.

Feb 19, 2011 | 1995 Jaguar XJ6

1 Answer

Radio code for radio of a 1987 jaguar xj6

ring jag with the vin num and they will provide it for you

Mar 13, 2010 | 1987 Jaguar XJ6

2 Answers

Jag xj6 2003

radio code for 1987 jaguar xj6

Feb 11, 2010 | 1991 Jaguar XJ6

1 Answer

87 jag xj6. Brake pedal spongy goes all the way

If the brake lines and fluid is clear then you may have to look at the brake booster found at the other end of the brake pedal under the hood...

Jul 23, 2009 | 1987 Jaguar XJ6

3 Answers

1984 jag xj6 has no power

Hi Clyde

Expect you have it running by now, as I see this was posted 2 March ?

If not......

Charge up your battery, and heavy discharge test, suspect you have short in the plates.

If OK, jump start with a set of proper heavy duty jump leads.

Good Luck !

A FixYa would be nice...Thank´s......John.

Mar 03, 2009 | 1988 Jaguar XJ6

2 Answers

Ive turned of my jag in park mode, now i cant restart it

Does your dash light up to indicate you have a battery source or power? If yes you have power try starting it in neuatral or in another gear. If it starts in neatrual maybe your selector going bad. If it starts in other gears repair the shift selector. Three If no power indicated check fuses. four will motor crank or turn over if yes look for a drivability problem. If no final maybe bad ignition switch. Need to replace ignition switch. Probably time for service

Feb 27, 2009 | 1987 Jaguar XJ6

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

291 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jaguar Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers


Level 3 Expert

77169 Answers


Level 2 Expert

489 Answers

Are you a Jaguar Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides