- Truck always ran fine, just never had cruise.
- Installed new cruise stalk/module → truck starts, then immediately dies (SEC light on). Same with old stalk reinstalled.
- Installed new spark plugs and wires (already had them) → no change.
- Tried 30-minute relearn → SEC light never went off, even after 20+ min.
- Fuses good (under hood):
- IGN 0 – 50A
- IGN 1 – 40A
- ECM B – 20A
- ECM 1 – 20A
- Suspected weak battery from leaving key ON → hooked up Harbor Freight charger, holds 12.6–12.7 V.
- Tried resistor bypass (2.2kΩ across yellow + black/orange at ignition lock connector) → relearn still failed.
- No voltage on yellow or white wires at ignition connector under column.
- Pulled BCM, checked blue connector:
- Yellow to black/orange: 0.20–0.30 V KOEO, rises to ~2 V while cranking.
- Same results at connector side and harness side after cutting wires.
- Security light stays solid, even overnight.
- End of the road: fuses fine, battery stable, SEC light never leaves, yellow wire never shows proper 5 V ref or mid-range return. Feels like BCM circuit or feed/ground issue — but I’m tapped out.
961_LS
I'm not familiar with a 2000, but you might use a Range device...but also on my 91 and 94 TAs, I have a jumper and a resistor I can plug in at the bottom of the column to override the VATS, just in case.
Someone might know if the wiring will allow for that...
![Image]()
Someone might know if the wiring will allow for that...
the jumpers I have pictured plug into a small connector at the base of the steering column. I believe one wire is yellow. I just got mating connectors from cars in a junkyard, but you don't need them. You have to read the resistance of your key, and then install a resistor of the same ohms in the jumper.
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