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BonzoHansen · 01-07-2009, 08:09 AM

You physically unplugged the ECM from its harness and checked? You need to check the continuity of the leads with an ohm meter. One probe at the correct pin on the ECM connector the other at the ALDL. A good circuit will be closed (0 resistance). You also may need to check short to ground, one probe at the correct pin on the ECM connector the other to ground. Here you want open (no resistance).

You might want to ask Stevoone for some assistance, he’s a GM tech.

01-07-2009, 08:09 AM	#8
BonzoHansen Admin. Join Date: Aug 2005 Location: Hamilton, NJ Posts: 20,165 iTrader: (27)	You physically unplugged the ECM from its harness and checked? You need to check the continuity of the leads with an ohm meter. One probe at the correct pin on the ECM connector the other at the ALDL. A good circuit will be closed (0 resistance). You also may need to check short to ground, one probe at the correct pin on the ECM connector the other to ground. Here you want open (no resistance). You might want to ask Stevoone for some assistance, he’s a GM tech. __________________ Vent Windows Forever! The looser the waistband, the deeper the quicksand. Or so I have read. Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors. Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop