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P38A Replacing Negative Battery Cable

Discussion in 'Range Rover' started by Jake Hewitt, Aug 20, 2018.

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  1. Jake Hewitt

    Jake Hewitt Active Member

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    Afternoon all. I have just replaced the negative cable as the connector wouldn't tighten, and the cable was too short to cut and attach a new one.

    I suspected the cable I got from Halfrauds may not be up to the task as its about half, maybe two thirds as thick as the original.

    On trying to start the car, she won't do anything, a vague beep on turning of the key.

    Is this going to be the cable not being heavy enough?

    Suggestions for a replacement cable?

    Thanks all,

    Jake
     
  2. wammers

    wammers STILL BREATHING. Donater

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    Might be a tad more expensive than Halfrauds. https://rimmerbros.com/Item--i-YTB101550
     
  3. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    I'd have thought plumes of smoke would be the symptom is the cable isn't thick enough. Did you rub all rust away for a good connection?

    Back to basics: what's the battery like? If it had a bad connection it might not have been charging.
     
  4. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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  5. Jake Hewitt

    Jake Hewitt Active Member

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    No plumes of smoke, I'll pull the ground off the body and give that a good rub down. See what happens.

    Battery is good, it's been charging just fine since I put a new alternator on it a year or two ago.

    The terminal was so loose that it would just pull right off, I figured I better do something about that.

    Was very handy for all the work the car always needs though...
     
  6. Jake Hewitt

    Jake Hewitt Active Member

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  7. wammers

    wammers STILL BREATHING. Donater

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    But it is the correct one for your car.;)
     
  8. Jake Hewitt

    Jake Hewitt Active Member

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    Yes it is!

    On closer inspection, the original splits in front of the fuse box, and it looks like it's earthed there too.

    I thought it was just routed that way, I'm guessing that is an important part to miss out..
     
  9. wammers

    wammers STILL BREATHING. Donater

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    If it's not earthed to the chassis (inner wing) nothing will work.
     
  10. Jake Hewitt

    Jake Hewitt Active Member

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    There we go then! Will correct tomorrow, thanks.

    As an aside, when I got back to the car yesterday, it had a little residual air in the bags, then dropped further.

    Tried to give it 15- 20 minutes to fill up the tank and then adjust the height, but it wasn't moving an inch.

    The compressor (new two years ago) is running but sounds a little strange, rattly perhaps? Is this a sign that internal seals need to be renewed?

    I have new front bags and new rear ones coming tomorrow, but it'll be useless if I can't put any air in them!

    Thanks @wammers
     
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  11. Datatek

    Datatek Well-Known Member

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    If the terminal was that loose, I doubt the battery has been fully charging.
     
  12. Datatek

    Datatek Well-Known Member

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    It's easy to make up your own cable, the wire and fittings are cheap to buy.
     
  13. Jake Hewitt

    Jake Hewitt Active Member

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    Will split it tomorrow and earth at the point in front of the fuse box, hopefully they will solve that.
     
  14. Datatek

    Datatek Well-Known Member

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    Might smoke if the cable is too thin.
     
  15. wammers

    wammers STILL BREATHING. Donater

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    Look at my post in the tech archive to test compressor output and various other things.
     
  16. Jake Hewitt

    Jake Hewitt Active Member

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    Thanks again @wammers

    All fixed now on the cable side of things, made up two separate cables rather than the factory spliced original.

    No more time left to investigate suspension this trip, but I've a rebuild kit for it coming just in case and four new bag waiting to go on, so plenty to do!
     
  17. Jake Hewitt

    Jake Hewitt Active Member

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    Kept an eye on, seems fine.
     
  18. Datatek

    Datatek Well-Known Member

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    Extra load in winter is when you will need to watch then.
     
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