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Old 04-07-2004, 08:16 PM   #1
subegt
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Member#: 58929
Join Date: Apr 2004
Location: California
Vehicle:
2000 GT Wagon

Question ABS Light

I have a 2000 Legacy GT Wagon. When I turn my headlights on the ABS light turns on. The dealer has not been able to isolate the problem for over four days now. The dealer claims the ABS system is working properly regardless of the light.

Aside from bypassing the light, has anyone seen this before or have a technical solution?

Thanks!
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Old 04-07-2004, 08:25 PM   #2
Mulder
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Chapter/Region: Tri-State
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02 WRX
15 WRX/05 GTO

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Could be an electrical system issue and not the ABS itself. The added drain from the lights may be causing enough of a voltage drop to trigger the ABS light.
I'd suggest checking the system voltage at the battery with a voltmeter to see if the alternator is charging properly. Check the voltage both unloaded (no accessories on) and loaded (lights on and some other things), it should remain around 13.5-14.5 until there is a very heavy load on the alternator, then it may drop down.
It's also possible to have a bad diode or two in the alternator resulting in "dirty" electrical output, so even though it would still charge there could be some strange electrical gremlins.

So, the short Cliff Notes answer is to fully check the electrical system and you may find your answer there.
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Old 04-09-2004, 12:26 PM   #3
subegt
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Thanks, for the reply.
Well it turns out to be a shorted brake lamp. This is the style that has two lead spots on the end. According to the dealer one of these bulbs was shorted. Six days for a light bulb? WOW.
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