As a follow up, I tested the voltages at the input to the ignition control module with the ignition key in the on position. Looking at the connector with the release mechanism at the top, there are 5 positions along the top row and 4 along the bottom. Numbering from left to right 1) to 5) and 1) to 4)
Top row: 1) black wire 0 volts, 4)white wire 4.7 v, 5)red wire 11.3 v.
Bottom row: 1) brown with white stripe wire .08 v, 2) orange wire 4.7v.
When I clipped on a battery pack the voltages rose from 4.7 to 5v and from 11.3 to 12v respectively. The car battery is no doubt run down.
2006 Cobalt LT Sedan 2.2L Automatic Laser Blue