ttalps2000
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| posted on 28/7/18 at 03:53 PM |
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Flickering Alternator Light
My alternator light has started to flicker! More going dim to not so dim and back to dim again. The alternator is not that old. My battery had a bit
of a heat issue, but has always charged fine and kept its charge etc. Battery is still keeping a charge as it is still starting the car ok etc.
Anyone else had similar and found a conclusion? Alternator is one of the small denso units
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JC
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| posted on 28/7/18 at 04:24 PM |
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Start with the easy....check the alternator Earth strap is secure?
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russbost
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| posted on 28/7/18 at 04:49 PM |
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Double check ALL connections & wiring to the alternator including those to the warning light, I seem to remember Denso are bolted rather than push
on? No sign of overheating on any terminals?
Try using jump leads to supply a direct earth & +ve feed from batt to alternator (Carefully!) if still no different then almost certainly the
rectifier partially failed, unit will still charge, but probably at a lower rate than normal. Depending how the rectifier has failed it can cause a
slow drain on the battery which you would be able to confirm with an ammeter
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
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Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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gremlin1234
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| posted on 28/7/18 at 04:58 PM |
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quote:
Originally posted by JC
Start with the easy....check the alternator Earth strap is secure?
totally agree,
also check fan belt
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ttalps2000
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| posted on 28/7/18 at 05:05 PM |
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the nut had fallen off the output lead post, re-connected and all working fine again now! CARS!!
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russbost
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| posted on 28/7/18 at 05:11 PM |
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Probably took you longer to make the post than it did to fix the problem!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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ttalps2000
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| posted on 28/7/18 at 05:41 PM |
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problem was, i didnt have a volt meter with me to be able to check the alternator! Went door knocking and one of my neighbours had one in the end!
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JC
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| posted on 28/7/18 at 07:44 PM |
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Son had exactly the same issue with his Toyota Aygo after I did an engine swap....hence my advice!
Glad you got it fixed!
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Irony
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| posted on 28/7/18 at 09:28 PM |
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It happens to me all the time when starting from cold. Tickover when warmed up is perfect but from cold until it warms up my V8s tickover
doesn't turn the alternator fast enough to generate power. So my alternator light flickers!
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David Jenkins
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| posted on 29/7/18 at 08:14 AM |
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I changed the pulley on the crank of my x-flow engine from the original pressed steel type to a machined solid steel one, as recommended in many books
- unfortunately the solid steel one is a bit smaller (I think it's to prevent the alternator over-revving on racing engines) so the alternator
light often stays on when I start the engine until I give the revs a blip, and flickers at tick-over.
I'd put the old pulley back (I don't rev my engine high) but the timing wheel is bolted to the front of it and I don't care to spend
spend several hours resetting that after the change!
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scudderfish
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| posted on 29/7/18 at 04:50 PM |
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quote:
Originally posted by Irony
It happens to me all the time when starting from cold. Tickover when warmed up is perfect but from cold until it warms up my V8s tickover
doesn't turn the alternator fast enough to generate power. So my alternator light flickers!
Mine does that but I find if I give the throttle a quick poke then it will go out and it will stay out even as the revs fall back.
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