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Electrical

Tiny
HANDYMAN
  • MEMBER
  • 1996 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 165,000 MILES
96 grand prix- No turn or tail lights. 12 volts at tail lights but no power at bulb when pluged in. Correct bulbs and all bulbs pass connuitiy test. What's up with this? Handyman
Sunday, April 3rd, 2011 AT 7:11 PM

10 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you check the ground?
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Sunday, April 3rd, 2011 AT 7:27 PM
Tiny
JDL
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Right tail lamp assembly, brown wire is voltage for taillamps. Black wire is ground.
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Sunday, April 3rd, 2011 AT 7:32 PM
Tiny
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Yes! I checked each wire on the wire harnes. Volt meter went to zero on connuity test. The only place I have not checked is from the point of connection, to switch connection on the ground. What puzzels me is when power is turned on I have 12 volts at ground wire? This would tell me that the bulbs are shorting out. Am I right?
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Sunday, April 3rd, 2011 AT 8:39 PM
Tiny
JDL
  • MECHANIC
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It maybe a faulty ground, that black wire. You can test a ground, testlite connected to battery voltage, touch the terminal for the black wire. If the ground is good, the lite comes on. Ithink I posted the wrong diagram before, sorry about that. The brown wire for voltage and black for ground still applies.
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Sunday, April 3rd, 2011 AT 8:59 PM
Tiny
HANDYMAN
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I just got back to this today. This is what I did. I took a black wire, ran it up under the ground connection on the wire harnes and touched it to the body of car. You wouldn't beleive it, but I have lights. Now can I leave it this way or do I need to go back to the negative side of the battery with a fuse link?
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Friday, April 8th, 2011 AT 1:44 AM
Tiny
JDL
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A redundant ground should work ok.
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Friday, April 8th, 2011 AT 1:00 PM
Tiny
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Thanks, for all your help. Any thing else goes wrong, it's time for TNT!
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Friday, April 8th, 2011 AT 10:49 PM
Tiny
JDL
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Hopefully, it won't come to that. Lol
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Saturday, April 9th, 2011 AT 12:13 PM
Tiny
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  • 12 POSTS
I've been driving it for a week, every thing seems to be doing great! For exception, I had to buy two tires today! Thanks guy's for all your help!
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Friday, April 15th, 2011 AT 1:27 AM
Tiny
JDL
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Anytime, have a great day.
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Friday, April 15th, 2011 AT 1:43 PM

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