1991 Buick Skylark ECM/pcm

Tiny
HARRY/ALICE
  • MEMBER
  • 1991 BUICK SKYLARK
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 35,000 MILES
How do I check the three inputs to the unit for the correct resistance.
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have the same problem?
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Tuesday, February 9th, 2010 AT 12:04 AM

7 Replies

Tiny
BUDDYCRAIGG
  • EXPERT
Resistance to what?
One of the sensors, or a circuit of wire.

What are you wanting to test?
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Tuesday, February 9th, 2010 AT 12:28 AM
Tiny
HARRY/ALICE
  • MEMBER
Lack of resistance in 1 of 3 cables going to the ecm/pcm caused an overload. What pins do I check
in the 3 cables to correct the problem before i
replace the electronics?
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Tuesday, February 9th, 2010 AT 11:29 PM
Tiny
BUDDYCRAIGG
  • EXPERT
Are you suggesting that you have 3 bundles of wires going to your ECM. And one of those wires, in one of those bundles has low resistance. And thus causing your ECM to blow up?
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Wednesday, February 10th, 2010 AT 12:03 AM
Tiny
HARRY/ALICE
  • MEMBER
Yes, the resistance to the ecm in one of the bundles
is too low or nonexistent, thus frying the system. It
should be a pair of pins in each bundle that could
give the answer so I can correct it before I order a new ecm/pcm
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Thursday, February 11th, 2010 AT 12:20 AM
Tiny
BUDDYCRAIGG
  • EXPERT
If you know what the resistance to each wire should be. Then you should be able to check them to find the bad one.

But I'm curious, how did you come up with this low Resistance idea.
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Friday, February 12th, 2010 AT 9:27 PM
Tiny
HARRY/ALICE
  • MEMBER
From the buick manual (chilton). Now I need to go to the library in phoenix, az thanks anyway harry h
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Saturday, February 13th, 2010 AT 12:42 AM
Tiny
2CARPROS LINSEY
  • MEMBER
Thank you for your donation. We appreciate it and look forward to helping you in the future.
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Monday, March 1st, 2010 AT 3:27 PM

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