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to backprobe the connector you simply push the needle end of your positive lead through the weatherpack (jelly like substance inside the connector)
and wiggle the needle probe until you make contact with pin inside the connector.
there is no need to cut, expose or strip insulation in order to obtain readings for given circuit.
caution - repe***ive backprobing could damage the weahterpack and allow moisture to enter the connector, so be gentle with it.
the negative lead should be touching good engine ground ( there are two 10 mm screws in front of the engine, next to wire harness and front injectors)
or just use battery neg terminal
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