An in-dash radio or tape deck has to be removed
you can remove the whole wiper assembly by removing the arms and blades
removing a cover on the wipershaft(maybe)
the 14mm nuts that hold the wiper shaft to the body( rubber seals)
and the 10mm bolt under the hood
take the wires off---
remember what color goes where draw a picture
you can work on it easier out
Still 6 Volt?
what parts are giving you the problem
I've got some parts I'd trade
hank
hank