GQ alternator light
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GQ alternator light| Macca |
Posted: Sep 3 2008, 07:16 PM
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Macca the Magnificent - Editor  Group: Moderator Posts: 82 Member No.: 289 Joined: 15-August 08  |
G'day..
I've got a small niggle in my GQ at the moment. The ignition/alternator light is on, but only if the revs are up (ie >2500rpm). It's only on very dimly @ 2500, but by 4000 it's fairly bright. I've only ever seen the light brighter at low revs, and goes out with higher revs, so this has got me stumped. I tightened up everything electrical I could find tonight, but wouldn't mind some input on where to start looking if that hasn't helped. Alternator was rebuilt by a supposedly reputable place in Carrum Downs just before the last school holidays. Just in case it makes any difference, my dual battery solenoid/relay seems to be playing up a bit at the moment - sometimes I'm getting 14v at idle at the aux postive lead, but other times it will be down at ~9v (the main will still be at 14v at the time). Cheers Macca -------------------- '90 GQ. 4", 33's & lights..
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| MYTTUF |
Posted: Sep 4 2008, 08:46 AM
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Jonesy Group: Members Posts: 2,136 Member No.: 8 Joined: 21-July 04 |
Regulator maybee?
-------------------- ONCE WAS MIGHTY!
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| ROGER |
Posted: Sep 4 2008, 03:09 PM
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Roger Group: Members Posts: 49 Member No.: 118 Joined: 3-September 07 |
It's broken take it back!
 -------------------- There is no replacement for displacement!
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| MYTTUF |
Posted: Sep 4 2008, 03:25 PM
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Jonesy Group: Members Posts: 2,136 Member No.: 8 Joined: 21-July 04 |
Or could be a faulty globe
 -------------------- ONCE WAS MIGHTY!
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| ROGER |
Posted: Sep 4 2008, 06:51 PM
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Roger Group: Members Posts: 49 Member No.: 118 Joined: 3-September 07 |
Maybe shity earth?
 -------------------- There is no replacement for displacement!
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| Macca |
Posted: Sep 4 2008, 11:22 PM
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Macca the Magnificent - Editor Group: Moderator Posts: 82 Member No.: 289 Joined: 15-August 08 |
Hmm.. Curiouser and curiouser..
 After tightening up everything last night, voltage has increased slightly. On the down side, the light is still coming on at high(er) revs. Now the interesting bit - it's not the ignition/battery light after all. It's the HANDBRAKE light.. Unless someone has other ideas, it looks like I'm off to see the auto-elec again.  -------------------- '90 GQ. 4", 33's & lights..
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| Macca |
Posted: Sep 7 2008, 12:24 AM
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Macca the Magnificent - Editor Group: Moderator Posts: 82 Member No.: 289 Joined: 15-August 08 |
Solved!! (I think).
Congrats to Jonesy on getting what looks like the correct answer (even if I get the feeling he just guessed) ..  It looks like I was getting backfeed over the circuit that drives all the warning lights because the ignition light was fubar due to a chafed wire. According to the wiring diagram there's a diode between the two lights that should stop that from happening, but it didn't seem to be doing its job. At least everything (except the dual battery relay) seems to be working right now.  -------------------- '90 GQ. 4", 33's & lights..
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