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Bobby, I sold my TCS in April after 3 month int redo. I did not try to trace and fix the grounds but added at least 3 new grounds. it was easy to do. The black trim at the bottom of the dash is metal and a source of grounds so I ran 2 or 3 grounds from the bolts on the shifter under the carpet to the bolts holding the trim to the dash. I ran a ground to each end of the dash. I also then ran a extra ground to the tach. You my want to replace the voltage sabalizer. I added an extra grounding strap inthe engine bay. The cost was very little and it helped with brighting the das lights a little. Also replace all of the gauge bulbs they do get weaker with age. I think a couple of my bulbs might have been original to the car from 74.
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