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What does a wiring harness with orange, purple and black wires go to and where?

Tiny
JJAROS8400
  • MEMBER
  • 1994 BUICK CENTURY
  • 85,000 MILES
I am putting my dashboard back together after a repair and I have a wiring harness under my steering column and I can't find where it plugs into. PLEASE HELP? 94 Buick Century Special
Friday, November 11th, 2011 AT 9:07 PM

11 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
I looked through all the wiring schematics and found nothing. Could it have been disconnected prior to the work?
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Friday, November 11th, 2011 AT 10:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Me too! Joe didn't get nothing on that harness/connector, maybe for a future use-What exactly is your car doing? If its doing okay continue to march
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Friday, November 11th, 2011 AT 11:04 PM
Tiny
JJAROS8400
  • MEMBER
  • 9 POSTS
I don't think it was disconnected when I started. I replaced my heater core and took the dash apart. It was running before but now it will only start for a minute and then die out. Is it possible for it to do that if one of the hoses to the core on the firewall is not on all the way or does not have enough pressure?
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Friday, November 11th, 2011 AT 11:29 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the blower motor resistor and blower motor wiring connectors make sure its firm/tight. Check every wiring connectors you can find-
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Friday, November 11th, 2011 AT 11:37 PM
Tiny
JJAROS8400
  • MEMBER
  • 9 POSTS
Ok thanks.I guess I will just go back through all the wiring under the dash board that I reconnected.
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Saturday, November 12th, 2011 AT 1:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Let us know if you find it. I wish we could be more help, but with the schematics, it is hard to find. Being there would make it a little easier, but still difficult.
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Saturday, November 12th, 2011 AT 1:39 AM
Tiny
CFB2011
  • MEMBER
  • 2 POSTS
Orange, purple and black (with a white stripe) are the colors of the wires going to the On-Board Diagnostics (OBD) connector in my 1994 Buick Century. It's a 12 slot connctor with only those 3 wires in it.
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Saturday, November 12th, 2011 AT 6:13 PM
Tiny
JJAROS8400
  • MEMBER
  • 9 POSTS
Do you know where it connects? Please tell me you do? It would save me so much time!
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Saturday, November 12th, 2011 AT 6:29 PM
Tiny
CFB2011
  • MEMBER
  • 2 POSTS
If we're talking about the OBD, it doesn't connect to anything under normal circumstances. It's used to connect a scan tool to read the engine trouble codes.

See the message thread on this web site labled "High Idle Speed"
That thread is discussing a different topic but it has a diagram and a picture of the OBD connector from a 1995 Buick Century. It looks the same as mine. It's mounted under the dash, under the steering column.
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Saturday, November 12th, 2011 AT 7:28 PM
Tiny
JJAROS8400
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Ok thank you. At least now I know that's not the problem. Still trying to find the problem. It turns over and may start for a minute but will not run. Can this be caused by not having enough pressure between the radiator and heater core?
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Saturday, November 12th, 2011 AT 7:48 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure and the Idle air control valve
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Saturday, November 12th, 2011 AT 11:48 PM

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