Home > Technical (L322) > Batt/Voltage/Warning light theory, help and advice please |
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JohnnyDangerous Member Since: 16 Dec 2012 Location: East Sussex Posts: 833 |
Re my other thread about the warning lights I changed what I now suspect to be a perfectly good battery but thats fine as I now have a nice Bosch S5, when we checked voltage using the snap on reset tool it was 13.6 with no asc on running @ 2500 rpm as soon as everything was switche3d on it fell to under 12.5v and slowly rose to 13.5 @ about 3500rpm, the warning lights have stayed off but come on twice, both times when the lights were switched on and the car was idling, is it feasable the alt is the cause of all the problems as I believe it should read 14.6v at anything over tickover? Just its an expensive 'oh it may be that' if its not a possability. One day your life will flash before your eyes......................................make sure yours is worth watching!
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27th Dec 2012 6:56pm |
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JohnnyDangerous Member Since: 16 Dec 2012 Location: East Sussex Posts: 833 |
Thanks should of made myself a bit clearer, the only warning light i DONT have is the charge light, I just dont think its putting out quite enough voltage to keep all the ecu's happy, I still hope its worth a go at changing the alternator but tomorrow im going to check it with a multimeter eng off, idle and under load then clean all the -ve & +ve connections and measure again. One day your life will flash before your eyes......................................make sure yours is worth watching!
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27th Dec 2012 9:59pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3964 |
There is one thing worth considering, the engine earth strap connections.
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27th Dec 2012 10:13pm |
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JohnnyDangerous Member Since: 16 Dec 2012 Location: East Sussex Posts: 833 |
HDC/DSC/ABS and EAS. As soon as the new batt went on no lights but as soon as I used it at night and put the lights on while doing a tight turn the warning lights all came back on, I know from the live data as soon as load is applied the voltage drops a lot but slowly comes back up, I dont think this is ideal. One day your life will flash before your eyes......................................make sure yours is worth watching!
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27th Dec 2012 10:16pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3964 |
From what you describe I think you are draining the battery whilst using the car due to the fact the alternator is giving out a minimal output insufficient to continually charge the battery.
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28th Dec 2012 10:59am |
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JohnnyDangerous Member Since: 16 Dec 2012 Location: East Sussex Posts: 833 |
Thanks, I am going to test it today as well as the earths etc, might even go the whole hog and test the leads for resistance etc as well as putting a better earth on the engine. If it is the alternator I may as well have a go at rebuilding it the parts arent to expensive and its worth the gamble, if it goes tits up ECP have one in stock for £275. One day your life will flash before your eyes......................................make sure yours is worth watching!
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28th Dec 2012 11:12am |
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kingpleb Member Since: 07 Jun 2011 Location: Maybe here. Maybe there, I get everywhere! Posts: 8455 |
NDF can diode packs not be replaced at all? FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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28th Dec 2012 12:21pm |
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kingpleb Member Since: 07 Jun 2011 Location: Maybe here. Maybe there, I get everywhere! Posts: 8455 |
PS whats the standard fit alternator to a 06MY TD6? as i've answered my own question and found plenty of kits on the bay and the like FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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28th Dec 2012 12:25pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3964 |
Yes diode packs can be replaced but on RR alternators they are mounted internally so you need to dismantle the alternator.
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28th Dec 2012 12:26pm |
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kingpleb Member Since: 07 Jun 2011 Location: Maybe here. Maybe there, I get everywhere! Posts: 8455 |
Happy to do it just need to know the model number as mines probably not happy from its dunkings over the last month and a bit so will take it out and see how much lithium grease i can protect it with
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28th Dec 2012 12:38pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3964 |
If your charge warning light isn't coming on there's nothing wrong with the diodes.
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28th Dec 2012 12:42pm |
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kingpleb Member Since: 07 Jun 2011 Location: Maybe here. Maybe there, I get everywhere! Posts: 8455 |
The last bit is the bit im sure its had once or twice if its been upto bonnet level then its got to have touched it
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28th Dec 2012 12:57pm |
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Rob2529 Member Since: 22 Nov 2010 Location: Wirral, uk Posts: 1470 |
Johnny when I was at the auto electricians he said overhauling the alternator was pretty straight forward. You just needed to cut the sealant from the case and then reseal once complete. Is probably having the balls to do it. I had a copy prob similar to what ECP are selling and it lasted lessthan4 weeks. [img]http://www.fuelly.com/driver/rob2529/range-rover[img/]
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28th Dec 2012 1:05pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6405 |
Check out this link, there is a link to a guide done by a Disco 3 owner (same type of alternator) showing how to replace diode packs. Once for a dark winter evening in the workshop.
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28th Dec 2012 1:44pm |
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