Knock sensor code and now no start, pcm fried ? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-26-2015, 10:17 AM   #21
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And when your checking those wires with a meter on both ends of the wire shake the harness see if the reading stays at 000
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Old 06-26-2015, 10:21 AM   #22
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Most shops don't want to deal with wiring they will just quote you a few thousand replacing the wiring harness
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Old 06-26-2015, 02:33 PM   #23
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Well gee wiz, i pulled the tail panel out and found a grounded out bulb wire that was wound up around one of the screw posts making contact with the body metal. LOL ! What a cluster. Strange though with the initial knock sensor code and no voltage, fuel pump fuse and tail light fuses popping. Thats why i had though the pcm was fried because of the metal from my air filter shield cutting into the pcm harness. Oh well, got a spare pcm now, lol.
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Old 06-26-2015, 02:37 PM   #24
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Quote:
Originally Posted by REGAL GUY View Post
The fuel pump is tied into the pass key system that the BCM controls
best thing to do get a wiring chart
unwrap the wires that got chafed
disconnect the ECM and trace 1 wire at a time
from the pin number from the ECM to the other end
that it shows on the chart
with a meter it should be 000 on each wire
when both ends are disconnected
you have a short to ground and or a open circuit

a shop will charge about 100 a hour or more on wiring with no
end in sight
Im glad i dug back into it this morning and found the issue, i was getting ready to have it towed to a shop this afternoon, im sure after they got a hold of it i woudlve been broke for sure.
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