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The mkiv Supra Owners Club

Alternator question.


vmax2000cc
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Can't answer your question but if you are looking for a similar alternator to the oem, it is possible to repair original for £20 parts and 2-4 hours of time. If I'd a refurb on my alternator years back before the forum so no write up I'm afraid but simply remove alternator opened it up found the diode pack and regulator, (basically two parts bolted inside. And searched the parts code written on them. A local marine and auto electrical store had them in stock. Paid about £20 for them popped them back inside bolt alternator back on checked that the float voltage was ~14V and did not exceed when engine was revved. Been working a dream for 3yrs now. Fixed a lot of electrical gremlins too.

 

 

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Can't answer your question but if you are looking for a similar alternator to the oem, it is possible to repair original for £20 parts and 2-4 hours of time. If I'd a refurb on my alternator years back before the forum so no write up I'm afraid but simply remove alternator opened it up found the diode pack and regulator, (basically two parts bolted inside. And searched the parts code written on them. A local marine and auto electrical store had them in stock. Paid about £20 for them popped them back inside bolt alternator back on checked that the float voltage was ~14V and did not exceed when engine was revved. Been working a dream for 3yrs now. Fixed a lot of electrical gremlins too.

 

/QUOTE]

 

Out of interest what electircal gremlins did you have?

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Tbh I can't say exactly, but firstly as may expect battery kept getting flats from not charging then I think because I didn't have a clean DC supply, random fuses would blow, dash lights giving warnings intermittently, maybe due to sensors dipping in and out. I just know that once alternator was refurbed any electrical faults made sense where before they didn't, my background is in electrical so I'd be tracing a fault all around the car from fuses to relays to sensors thinking why am I getting problems everything seemed to test correctly individually but would still get trips or warnings etc. Not sure how much that helps was several years ago now.

 

 

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All 1JZ & 2JZ alternators are plug and play in terms of plug used and mounting holes. The only difference other than the current output of the alternator itself , is that on NA and TT alternators, the position of the alternator plug is slightly different, but there is enough wire on the plug to reach either, so usually not a concern.

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Forgive me for being thick, but I were told there are two types of plugs for these cars, circle plug or oblong?

 

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Correct, although these days it's rare to to see a round style plug as they were only on super early engines or older 7M GTE and so on. 9/10 times its going to be an Oval plug for both TT/NA. The part number you mentioned above uses oval plug, so will be direct fit to your NA loom as is.

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