Hi Ted -

Don's picture from Haynes sez on the lower margine typical of 1984. It looks almost exactly like my 1988 Volvo Service Manual page. OK there.

Rheostat. Terminal #58b. GR is power from fuse #16 which is powered from the headlight switch. Same terminal W-R shows for (1987 models) goes to lights in e-brake in back for seat belt warning and ashtray. In the 1988 this line also goes to lights inside the seat belt stalks.


Terminal 58a. Two BN wires. One wire goes to the lights in the center control panel. The other goes to a connector where there is one BN in and two BN out. One wire goes to the lights in the center control panel. The other wire goes to instrument cluster circle-shaped connector, terminal #10.

The other BN wire on the rheostat terminal #58a goes to the gear indicator in an AW70 car.

The diagram does not show a yellow wire anywhere on the page.

The ground side for the lights in the instrument cluster goes through the arc-shaped connector, terminal #4. SB wire (aka Black).

Do you have a tach and the small clock? Light in small clock gets power and ground same as the instrument cluster lights.

Hope this helps.

Bob

:>)