Thanks! I disconnected it completely and the engine still cranks.
The Haynes manual is definitely missing some information,
although it's understandable how something insignificant that
was only present for one model year could get overlooked.
Did you figure this out by tracing the wires?
On Thu, 08 Mar 2001, Bob Sykes wrote:
> Lots of interesting speculation so far but:
>
> The mystery component is a "lamp test" relay. It momentarily
> illuminates the brake warning lamp and EGR service lamp when
> you crank the starter. It is wired as follows:
>
> The green/white wire (terminal C1) goes to EGR light (indirectly)
> & service interval switch.
>
> Terminal C2 & W2 are connected together and to chassis ground.
> A black/blue wire connects from W2 to the Left hand seat (not
> seat belt) switch.
>
> Terminal W1 has two white/orange wires. One comes from the
> starter solenoid (+12V signal in) the other goes on to the
> seatbelt timer/buzzer/annoyance device.
>
> Terminal C4 has a black/purple wire which goes to the brake
> warning light.
>
> This wiring scheme is unique to 1976 model US spec. cars.
> '76 model cars have J type Overdrive with no OD relay.
>
> Haynes schematics can be useful, but beware, they contain
> errors.
>
> Hope this helps.
>
> --
> LBC'ing U,
> Bob (& Spitfires)
> [digest mode]
> http://home.att.net/~stan.part
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