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Rob`
Joined: Wed May 08, 2013 7:09 am Posts: 54 Location: Sydney, Australia
Vehicle: 2012 Jimny
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 Posted: Sun Jul 14, 2013 12:02 am |
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Hi all, I just had some Lightforce 240 Blitz' installed on my Jimny and I was wondering if someone could help me out? The issue I'm having is that when I turn on my spotlights they appear to be quite dim. However, when I brake, the lights become significantly brighter and I'm not too sure why... The same thing happens if I've had a read of this thread: viewtopic.php?f=17&t=1108, but as I didn't install them, I'm not too sure where the issue could be... Has anyone heard of something like this happening before, or where I should start looking?
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atari4x4
az supporter
Joined: Mon Dec 11, 2006 10:30 pm Posts: 34842 Location: East Radelayed
Vehicle: SV420+SV620 Vitara's
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Posted: Sun Jul 14, 2013 12:17 am |
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are they wired through a relay?
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You're just hating because you don't understand
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Rob`
Joined: Wed May 08, 2013 7:09 am Posts: 54 Location: Sydney, Australia
Vehicle: 2012 Jimny
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Posted: Sun Jul 14, 2013 12:23 am |
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atari4x4 wrote: are they wired through a relay? Yep
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atari4x4
az supporter
Joined: Mon Dec 11, 2006 10:30 pm Posts: 34842 Location: East Radelayed
Vehicle: SV420+SV620 Vitara's
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Posted: Sun Jul 14, 2013 12:29 am |
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where are the earths for the spotties & are they earthing to clean bare metal?
_________________
You're just hating because you don't understand
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Rob`
Joined: Wed May 08, 2013 7:09 am Posts: 54 Location: Sydney, Australia
Vehicle: 2012 Jimny
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Posted: Sun Jul 14, 2013 12:32 am |
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atari4x4 wrote: where are the earths for the spotties & are they earthing to clean bare metal? From the looks of it, I think they might be earthed out to the battery... I'll have to have a look in the morning but do you think this could be causing the issue?
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atari4x4
az supporter
Joined: Mon Dec 11, 2006 10:30 pm Posts: 34842 Location: East Radelayed
Vehicle: SV420+SV620 Vitara's
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Posted: Sun Jul 14, 2013 12:35 am |
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yeah could be, i've always earthed to the body & as close to the lights as possible. eg radiator support panel or somewhere similar.
_________________
You're just hating because you don't understand
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Rob`
Joined: Wed May 08, 2013 7:09 am Posts: 54 Location: Sydney, Australia
Vehicle: 2012 Jimny
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Posted: Sun Jul 14, 2013 9:59 am |
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Looks like it might be the earth Atari.
They've earthed it to the radiator support panel, but it's not clean metal, it's the powder coated panel at the back. I'll relocate it and see if it fixes it : )
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whincup
az supporter
Joined: Sat Apr 17, 2010 11:30 pm Posts: 1588 Location: Gracemere, QLD
Vehicle: '94 suzuki maruti
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Posted: Sun Jul 14, 2013 7:33 pm |
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definitely an earth issue, but i'd guess the main earth from the battery negative terminal to the body isn't sufficiently big enough.
i had an almost identical issue with my old sierra, but it was the clutch instead of the brake. the standard earth for the battery to the body is tiny, but theres another major earth that earths to the starter, which is obviously connected to the engine/transmission. in my case the clutch cable was earthing the transmission to the body since the engine itself uses rubber engine mounts. but only when the cables pulled tight it actually earths. im assuming it's something similar with brakes...
as atari said, it does need clean bare metal so worth checking both definitely.
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Rob`
Joined: Wed May 08, 2013 7:09 am Posts: 54 Location: Sydney, Australia
Vehicle: 2012 Jimny
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Posted: Sun Jul 14, 2013 8:31 pm |
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whincup wrote: definitely an earth issue, but i'd guess the main earth from the battery negative terminal to the body isn't sufficiently big enough.
i had an almost identical issue with my old sierra, but it was the clutch instead of the brake. the standard earth for the battery to the body is tiny, but theres another major earth that earths to the starter, which is obviously connected to the engine/transmission. in my case the clutch cable was earthing the transmission to the body since the engine itself uses rubber engine mounts. but only when the cables pulled tight it actually earths. im assuming it's something similar with brakes...
as atari said, it does need clean bare metal so worth checking both definitely. Thanks whincup, I'll give that the once over when I'm going through during the week.
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fordem
Joined: Mon Apr 19, 2010 11:30 pm Posts: 2656 Location: Georgetown, Guyana
Vehicle: APK416, A6G415, A6N415
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Posted: Mon Jul 15, 2013 12:50 am |
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whincup wrote: definitely an earth issue, but i'd guess the main earth from the battery negative terminal to the body isn't sufficiently big enough.
i had an almost identical issue with my old sierra, but it was the clutch instead of the brake. the standard earth for the battery to the body is tiny, but theres another major earth that earths to the starter, which is obviously connected to the engine/transmission. in my case the clutch cable was earthing the transmission to the body since the engine itself uses rubber engine mounts. but only when the cables pulled tight it actually earths. im assuming it's something similar with brakes...
as atari said, it does need clean bare metal so worth checking both definitely. This is pointing to a problem with the engine to battery negative connection, rather than the body to battery negative - as is the original poster's problem - if it were a body to battery issue, the light would get dimmer rather than brighter - the increase in brightness is caused by a variation in the alternator to battery negative voltage caused by the bad ground.
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