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RWD - Speedometer bugs

Volvo RWD 200 Forum

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Speedometer bugs 200 1993

Hello all,

Some electrical gremlins have recently popped up in my 93 244. I've previously had bouncing speedo problems solved by plugging in the 3-pin L plug when it comes loose, but in this case my speedo is bouncing and the ABS light comes on and stays on after reaching something like 5 mph.

Things I've tried, to no avail:
- Reflowing solder on the original speedo (K40168)
- Retensioning pins in 3-pin L plug
- Swapping a different speedo from the same year (K39200)
- Swapping the rear diff speed sensor with one from a 940

I tested a speedo from a 91 (k1xxxx) which had smooth motion but with a higher than normal speed. The stock k40168 speedo will usually seem fine until 20mph, or may bounce erratically. The motion is definitely unpredictable.

It could be that the sensor and k39200 speedo were also bad. Next in line is trying a new rear diff sensor, although I am certainly open to suggestions.

Does this sound familiar to anyone?






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