Wiring my LS-Swapped Jaguar XJ-S

I got the stop lamp relay wrong...pin 30 and 87a are the ones that are in series when the coil is not energized....not 87 and 87a. Confirm with a multimeter! I started with a 2003 GMC Yukon harness and heavily modified it so it fits in this 1990 Jaguar XJ-S. There are lots of ways to do this that take less time and effort. You can get brand new swap harnesses on ebay but I enjoyed the challenge of getting this truck harness to work in a car where the PCM is in a different location. The best resource for a rework: https://www.youtube.com/watch?v=92MV5gBonls lt1swap.com also has many wiring diagrams and tricks for how to get an LS running in anything. LS swap wiring. How to wire an LS swap.