ECM Wiring Diagram

[Don.F.Broadus at ucm.com]

Hello David; Just got back on line today. Off line could you please give me
the cost for the OTC 2000 including shipping
                    And I will cut you a check.               Thanks   Don

	-----Original Message-----
	From:	David A. Cooley [SMTP:n5xmt at bellsouth.net]
	Sent:	Tuesday, December 29, 1998 3:03 PM
	To:	diy_efi at efi332.eng.ohio-state.edu
	Subject:	Re: ECM Wiring Diagram

	At 03:46 PM 12/29/98 -0500, you wrote:
	>
	>I'm confused by this.  If the white wire doesn't go to the ECM,
where does it
	>go and what is it's purpose?  Can I still get it from inside the
car somewhere
	>like I originally thought, or will I have to run that dreaded wire
out to the
	>coil?

	It runs from the ignition module to the ignition coil.  There is an
	ignition pulse feed to the ECM in the car, but it is a VERY low
current
	signal and loading it with an accessory such as a remote starter
could
	cause problems (IE Burn up the ECM)...
	If there was a factory option for a tach, the wiring harness should
have a
	wire leading to the dash just waiting for a tach... they liked to
use one
	harness for all the vehicles so as not to have different parts for
the same
	make/model.
	A wiring diagram would help you a lot!
	If there was no in-dash tach option, then you will need to tap into
the
	white wire that goes from the distributor module to the - side of
the
	ignition coil.  When you run it through the firewall of the car,
make sure
	you use a grommet!
	Later,
	Dave

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	           David Cooley N5XMT           Internet:
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