They quit making the 760 in 1990.
Haynes Repair Manual for Volvo 760/740 has diagrams of the vacuum sub-systems.e,g. the EGR, the ignition etc
it's located beside the passenger side.
not key. but a set nibble to set in pulley.
officially it's 195/60R15.
Heater core failure.
n.a. fuse relay only.
its located at the bottom of the shifter assembly under the consol.
nearly dead centre. maybe slightly right. it activates by being moved upward.
well I have 1990 Volvo 760 and its horn is in the regular place, in the middle of the steering wheel. But my horn doesn't normally work when I am driving because my key lock is so worn, maybe your car has the same problem. I have to turn my key towards the off direction by about 5 mm before my horn and radio will work.
25 mpg loaded with 1 ton weight, and not driven gently. Mixture of town and country driving.
The ignition amplifier module or power stage is bolted to the left front inner fender near the battery.