'88 90Q Trans/Ceter Diff questions

[siambisg at uchastings.edu]

>If I actuate the button, the rear plunger moves and appears to lock the diff >but the light doesn't come on.

Randy,
when the rear diff is locked, the yellow "Anti-Lock Off" light on the instrument cluster should turn on...and, i believe, confirm that the rear diff is actually locked, despite the broken light on the diff switch.

hth,
george siambis
'88 90q