Check the Grounding of the Control Module

1 Check the grounding of the control module by taking a voltage reading across battery positive and pin E (5) of the control module connector.
The reading should be about 12 V.
2 It the reading is not in the region of 12 V, check the wiring for continuity or a short circuit by measuring the resistance across pin E (5) of the control module connector and the grounding point.
The resistance should be ≤ 1 ohm.
If the wiring is OK, continue diagnosis as described in "Checking the Power Supply"