Hi Ozzy Oz,

As in "Diary of a Madman" and "Blizzard of Oz"? Ha!

The OP to this thread has not posted to the brickboard since 2012. Doubtful he'll reply.

Please note Uncle Spook's mention of wiring issues. So, some wire cable and harness inspection may be due.

Do you have any other fault codes? If even unrelated to the A1 2-3-2 signal? I ask as the ABS system on your 1995 Volvo 240 uses the differential mounted speed sensor, same used for the speedo signal. Also, check the transmission for fault codes. You'll need your OBD II tester. (I guess you have an OBD-II tester, or you have the blinky box still?) If without one, contact your fave local auto store and ask if they have a tester you can use. Though consult the i-net on how to perform an OBD-II fault code check on your 1995 Volvo 960 before hand. All codes should display for all fault reporting components (Engine Control, ABS, Transmission, Arm Chair Espresso Machine, you know ...)

I see you live in humid, rusty, and snow flake and tonnes of salty Cleveland OH. So, in such an environment, corrosion at wire harness connectors both exterior and inside your Volvo 960 could be suspect. A mere disconnect and reconnect may be all you need.

Though, as Spook suggests, wire harness issues may be at play, such as a flexing cable causing the copper conductor to break inside the insulation, causing an intermittent fault or weak signal.

Please see:
http://www.volvowiringdiagrams.com/?dir=volvo/960%20Wiring%20Diagrams

You want file titled "Volvo 960 1995.pdf"

On PDF file page 24 of 44, please note at the most upper right the VEHICLE SPEED / ABS SENSOR (REAR DIFFERENTIAL). The sheathed cable contained two wire with color stripe. After the seal, there is a connector. The two striped wires goes to the ABS control module while the Green / White wire goes to the speedo assembly. From the speedo assembly, through the connector wire harness, I'll guess a hazard (Ha!) a wire carries the speed sensor signal as it is or processed through the speedo to both the transmission and the Motronic engine control system.

Like Spook, I've not owned a 960 now have perform such a task on it. So I'm merely reviewing what I can find on the issue. A 21+ year old speedo guage assembly can be faulty as solder joints can crack. Also, connectors get corrosion and can be gleeful of a twist or disconnect-reconnect.

Also, please review the wiring diagram.

Hope that hep kats (helps.)

Questions?

Though other with the hands on will illuminate the way to remediation of your speed signal fault code.

cheers,

Fleas and Mites MacDuff.