Quote:
Originally Posted by hud 91gt
I should have asked if the voltage drop was during cranking, or the starter relay has a lack of voltage even prior to cranking.
If the battery load tested ok, i'd say it's time to keep looking. Curious if the vehicle is left outside tonight or not. Will take some more juice to turn that over at -1, then 10-15 degrees that the shop is held at.
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I think/hope they're leaving it outside.
I forgot to mention to this earlier - the vehicle does not crank at all when the issue is happening. Starter relay does not get power, and the voltage drops happens before the starter relay. It was definitely happening on the output of the certification ECU (to the starter relay). Further diagnosis hasn't happened as the truck has been starting.
If they boost the truck by giving power to the starter, it does power on, but subsequently dies after driving a few metres and changing from drive to reverse.