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Old 03-07-2004, 09:20 AM   #1
alacrity024
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Default Alternator Warning lights in my SVX (underdrive pulley)

hi all-

when the stock 2-piece crank pulley separated on my '92 SVX, i opted for a cheaper, one-piece lightweight, underdriven pulley to replace it.

Since doing so, i've been getting alternator warning lights at sort of odd intervals. near as i can figure, they start coming on when my revs are below ~2,000.. they also come on sometimes when the car goes over a bump. the second bit kind of confuses me.

the reason i mention the underdrive pulley is because it would make sense that the alternator isn't spinning quite as fast anymore, right? the warning lights never really stay on for very long.. they fade in and out. it seems like maybe the alternator is just barely getting enough "spin" but sometimes it dips a bit, like when the PS pump starts up?

some SVX guys have reported brighter headlights, louder stereo, etc. when running a fat wire between the negative terminal of the alternator and the negative terminal of the battery.. do you think this "mod" would free up a bit more juice and solve my problem? should i just abandon the underdrive?

thanks in advance, and mods feel free to move this if you think it would get more response in a different section.

-adam
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Old 03-07-2004, 09:24 PM   #2
SVX WRX
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is the belt tight? loose ground wire?

why alacrity no SVX Network?
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Old 03-08-2004, 10:13 AM   #3
alacrity024
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svx.net was down, plus i've already asked there.. nobody had a real solid answer for me, so i figured i'd try here, but it looks like i'm getting the same (lack of) answer..

-adam
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Old 03-08-2004, 10:34 AM   #4
Mulder
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Upgrading the wiring between the alternator and the car would certainly be a good idea, it may help and can't hurt.
Do you have a voltmeter in the car? If not it might be worthwhile to install one at least temporarily to see what the system voltage is at various times particularly when the alt light comes on.
Since your problem started with the installation of the underdrive pulley it would most likely be corrected by replacing it with a stock-sized one. I realize however that SVX parts don't grow on trees and aren't cheap.
The light coming on over bumps is another issue, all I can say for now about that is to check all connections at the alt, battery, and vehicle and engine grounds. There may have been a pre-existing problem that wasn't enough to turn the light on until the pulley was changed and the alt output dropped.
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Old 03-08-2004, 11:15 AM   #5
alacrity024
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okay, checked the connections at the alternator and i found something that might be causing the "bump effect"

there's a set of wires that "clips" into the alternator.. they don't bolt down, but they actually snap in... well, the "clip" bit is broken, so it's a little TOO easy to just pull them in/out.. i'll bet a dollar that's what's causing the lights to come on over bumps.

how on earth do i fix that? i can't exactly replace the piece of broken plastic, because, well, it's probably long gone.. i don't really think i could TAPE the thing down to the alternator (besides, it prolly gets mighty hot in there)

could i try to cut the old connector off and splice a new one on? is this a thing i could buy at autozone, or am i going to have to clip one off someone's SVX?

-a
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Old 03-08-2004, 11:22 AM   #6
Mulder
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You might be able to compress the male terminals in the connector for a tighter fit. Try sticking a small screwdriver or whatever in there to make the gap a bit smaller so it grips the female terminal more securely when plugged together. This may help the juice to flow better as well. I'd have to look at the setup to get a better idea, but maybe you can do something with zip ties to hold the connector in place.
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Old 03-08-2004, 12:35 PM   #7
alacrity024
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heehee... "zip ties, the rich man's duct tape!"

-adam
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