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Old 11-19-2009, 11:05 AM   #1 (permalink)
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Date registered: Jun 2009
Vehicle: 91 560 SEL, 77 450 SLC
Location: VA
Posts: 15
77 450 SLC Charge Light + Alternator

Hi, Can someone tell me if the is supposed to be power at the small blue wire from the alternator. It has no volts out of it either with ign on or running.

A few weeks ago i replaced the alternator thinking it was faulty. Symptoms were the charge light never came on with the ignition on and the battery went flat.
Seems the alternator was ok but the bulb was blown. I replaced the bulb and all was good for a few days then the charge light went out again. The bulb is ok this time.
The #5 fuse is ok. Is there any relay in the bunch near the fuses that controls the charge light.

There is power to the instrument cluster on 2 terminals. I think 5 and 7 but i could be wrong on those numbers.

Thanks in advance
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Old 11-22-2009, 08:03 AM   #2 (permalink)
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Date registered: Jun 2009
Vehicle: 91 560 SEL, 77 450 SLC
Location: VA
Posts: 15
alternator wire

Can anyone tell me if the small blue wire from the alternator is supposed to have power with ign on or running

Thanks
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Old 11-22-2009, 08:07 AM   #3 (permalink)
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Vehicle: 1987 560SL
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If I'm not mistaken, it's a neg line.
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1987 560SL Completed 4400 mile round trip in 6 days with only cruise control issues...can you claim the same?

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Old 11-28-2009, 04:11 AM   #4 (permalink)
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Date registered: Jun 2009
Vehicle: 91 560 SEL, 77 450 SLC
Location: VA
Posts: 15
Quote:
Originally Posted by jplinville View Post
If I'm not mistaken, it's a neg line.
Thanks for the info
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