500SEL (126.037) V8-5.0L (117.963) (1984)
16.
Route connector block harness with two connections to instrument cluster opening and connect brown wire to ground location (W1, Figure 5).
17.
Route grey/blue wire further under instrument panel along main vehicle harness to the center console and attach with electrical tape (Figure 6).
18.
Connect grey/blue wire to terminal block (X6, Figure 7).
19.
Reinstall instrument cluster.
20.
Reconnect battery negative terminal.