SES Lamp driver question

[Bruce]

Just attach the ecm to the *module* side of the SES bulb (bypassing the
module).
Bruce



From: "Jay Vessels" <jwvess00 at home.com>
Subject: SES Lamp driver question
> Hi there!
> I'm currently installing a 1228746 ECM / TBI system from an '89 Caprice on
> an '85 Caprice, 305V8/4bbl/700r4/Federal emmissions/CCC control.  One
issue
> I haven't completely decided how to handle is the SES lamp driver.
> The CCC cars have a "Lamp Driver Module" that connects the ECM to the
lamp.
>  The lamp is tied to +12VDC.  As far as I can tell, the CCC ECM grounds
the
> SES lamp signal to the lamp driver module to light it.  Fuel injected ECMs
> like the '846 have no such lamp driver module, and the SES lamp itself is
> grounded.  Is this right, or am I mistaken?
> If this is true, then the SES lamp output signal from the '846 is inverted
> from what I need to drive the lamp.  Anyone have any simple,
> automotive-proven circuits they'd like to share?  I was thinking a simple
> 2N2222 transistor inverter in a sealed project box, but I haven't built
> much electronics for automotive use so I don't know what special
> precautions I'll need to take concerning temperature stability,
> current-handling needs, power supply quality, etc.
> Thanks for any assistance,
> Jay Vessels

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