My 86 TA had an older style lo-jerk system installed when I bought it. I yanked it out, which was located under the dash. It may vary upon vehicle though. Ive heard units were located under the dash, under the frame, trunk, and other inconspicuous places. And a warning... Wiring was like that of ****ing spaghetti, well, at least mine was. I felt like I was diffusing a bomb when removing mine
