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1987 7MGTE
615 Posts
On an 87 Turbo with the R154, there are 2 sets of wires with plugs similar to this that head back over the transmission. They clip onto the bell housing front on the drivers side. One is for the backup light the other is for the ABS. You might be able to run it down by recording the wire colors / stripes and referring to the Toyota Supra wiring diagram. Here is a link to the online manual.
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