Need to wire up a CEL

[Tony Hoffman]

Pin 31 of the ECU, yellow wire. That is the one that powers the light, which
is refered to as the "knock sensor light" in the Bentley. it goes through
the Kostal connector T14c/pin 11, which may be the same one you are refering
to.

for some reason in the manual it is shown to have power with the FP Relay
on, but of course is not powered unless the terminals are jumpered.

HTH,
Tony

On Mon, Apr 4, 2011 at 8:04 PM, John B <pre95 at live.com> wrote:

>
> Hey folks,
>
> I need to wire up a check engine light for my 84 4000 turbo convert (MC1
> Mac11 I believe), but have absolutely no light right now at all. I'll be
> doing this one from scratch. I understand Pin 11 on my kostal connector is
> the trigger wire to start the code sequence which I connect to a BUS fuse
> holder (or trigger) and the ground side of my CEL light bulb in the cluster.
> Here's the kicker, without having the check engine light in place now, I'm
> not sure where the positive line of the bulb runs to for the codes to stream
> from (ECU? Other sensor? what color wire would it be?).
>
> I checked the fuseblock which no longer houses the fuel pump relay... cant
> seem to locate that either. I need to dig in to this wiring and track it all
> down.
>
> Insight appreciated!
>
> Pre95
> Johnny
>
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