It's actually pink/white
On European and UK cars (from 1980 on) it sits between a white wire coming from the ignition switch and a white/yellow wire coming from the starter relay/going to the coil (+ terminal).
Not to be confused with the white/pink wire running from the ignition switch ...
If you find it, it should have a resistance between 1.3 and 1.5 Ohm
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<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>