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numatik · 08-23-2002, 02:17 PM

on your ECU there is at least 1 wire that carries a "tach" signal. The voltage on this wire changes as the engine RPMs change. What year is your 240? If you go to a place that installs alarm systems they can probably find it for you.

08-23-2002, 02:17 PM	#3
numatik Join Date: Aug 2002 Posts: 21 Trader Rating: (0)	on your ECU there is at least 1 wire that carries a "tach" signal. The voltage on this wire changes as the engine RPMs change. What year is your 240? If you go to a place that installs alarm systems they can probably find it for you.