As many of you know, I've been disassembling my 1986 740 GLE wagon. I've amassed a large pile of spare parts for my 940 and for sale to needy 740 drivers (e-mail me if you need something). Anyway, my 1986 740 had a premium stereo with a volvo amp and good speakers. By contrast, my 1995 940 has a passable stereo that generally sounds poor. I'm thinking of installing the older stereo in my newer car. The form-factor for the unit is the same, but I'm concered about changes to plugs and wires and such over the 9 years that separates these two cars. Has anyone done this before? Any advice?
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Six Volvos: all wagons.... 1972 145S, 1976 245 DL, 1983 245 GL, 1986 740 GLE, 1990 740 GL, now a 1995 940. Number 7 (a 1967 122S Wagon) is on the way.... Who needs a sedan, when you've got storage compartments in a wagon?

Jack:
1. Get out the wiring diagrams for both (or search the archives for pin-out info)
2. There's a pin-out diagram that should be the same as your later car on Bay 13 .
The easy way is to get a Metra/Scosche ( see Crutchfield's) vehicle harness adapter for the car you're installing into, then wire from the radio and amp to that adapter. If you have access to a junkyard, get the vehicle harness-side connections for the older car and wire it to the Scosche adapter, to make a complete adapter kit.
Your '95 940 may have a CR 915, running 6 channels with no external amp, or another model with or without and external amp. Email me if I have confused you unnecessarily, and I'll se if I can help further.
Which models of head unit and amp are you moving to the 940, and which are you discarding?
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We have met the enemy and they is us. [Pogo] S70 T5 cop car : Rough Rider suspension, Walmart fog lights, eBay speakers, ambiance by Pall Mall, trim by Le Duc d'Tape, 8-channel THD by OEM amps