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Location:
tas
Registered:
June 2002
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how to test your alternator in a ma70?
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Wed, 29 October 2003 08:39
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my alternator has no fuse, the previous owner has just wired it striaght up bypassing the fuse altogether, my battery always goes flat, how can i test it to see if it still works?
traditionally i'd test an alternator by unhooking the battery terminal while the car is running, and if the engine stays on the alternator works.
But i've heard you shouldn't do this method with an MA70 supra.
why can't I? and also what other method can i use to test the alt.?
rev the engine with the lights on? i tried that but the lights didn't change brightness, meaning the alternator is probably dead, but id like a more sure method of testing it.
Cheers.
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Location:
Gold Coast
Registered:
January 2003
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 08:46
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try a multimeter across the battery. should be around 14v with a few revs on board.
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 09:11
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as the bushman above said, use the a multimeter across the terminals, at idle you should have anywhere between 12ish-15ish.
i would be a good idea to get it to a sparky and have them fush it for you as there is a good chance of a fire or explosion.
justin
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 09:20
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also u might want to run a multimeter from the back of the alternator to the negative terminal of the battery. in my car i found out the wire leading from the back of the alternator to the battery was stuffed and not the alternator!
food for thought
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Location:
Gold Coast
Registered:
January 2003
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 09:24
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what do you mean "as the bushman above said"
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 09:36
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sorry man, i clanced at your user name and thought it said bush banshee!!! 
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Location:
tas
Registered:
June 2002
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Re: how to test your alternator in a ma70?
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Wed, 29 October 2003 17:07
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thanx for the tips fella's the multimeter proved that my alernator works.
cheers.
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Registered:
June 2002
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Re: how to test your alternator in a ma70?
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Fri, 31 October 2003 05:37
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Testing the voltage alone is not a very compreshive test. You want to also check the current supply.
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