lights go dim?

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martin1973
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lights go dim?

Post by martin1973 » Mon Mar 21, 2011 9:44 pm

when i rev my engine the lights go dim?
any ideas?
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Darrell
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Re: lights go dim?

Post by Darrell » Mon Mar 21, 2011 9:50 pm

Never heard of that before :er:
But :welcome: along.
Someone may a few idea's...
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martin1973
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Re: lights go dim?

Post by martin1973 » Mon Mar 21, 2011 9:55 pm

oh it would appear thats was my first post?
i have posted b4 but i dunno.
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ScottieJ
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Re: lights go dim?

Post by ScottieJ » Tue Mar 22, 2011 12:15 pm

Hi there, you might have posted in between the last backup and the website going down, therefore lost all your posts. we now backup the forum every night so we shouldn't ever have that problem again hopefully!

Firstly what model is your sj and what engine is it running?
If anything as the engine revs increase the alternator should kick out a bit more power, not less?
Is the alternator belt in good condition, tight enough and not slipping at higher revs

If it's ok then i'm thinking either a problem with the idle up system (if your sj has one), the alternator could need new brushes or the battery is weak.
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martin1973
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Re: lights go dim?

Post by martin1973 » Tue Mar 22, 2011 10:04 pm

thanks for the info
its a sj410q
fan belt fine, will check the alternator output.
i'm running su carb.
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4eye
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Re: lights go dim?

Post by 4eye » Tue Mar 22, 2011 10:43 pm

hey,....another 410q....welcome! ;)
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ScottieJ
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Re: lights go dim?

Post by ScottieJ » Tue Mar 22, 2011 10:53 pm

Your sj doesn't have an idle up system in that case so that rules that out, test the alternator output throughout the rev range it shouldn't drop, if it does I would imagine that's where the problem is.
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Darrell
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Re: lights go dim?

Post by Darrell » Tue Mar 22, 2011 11:12 pm

Is that the model with the seperate voltage regulator unit, IE not built into the alternator.
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martin1973
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Re: lights go dim?

Post by martin1973 » Sun Apr 03, 2011 10:18 pm

problem solved, battery earth to body missing.
thanks for the advice.
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Darrell
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Re: lights go dim?

Post by Darrell » Sun Apr 03, 2011 10:27 pm

Glad you sorted it, thanks for letting us know :thumbup:
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