1997 Volvo 940

Brakes problem
1997 Volvo 940 4 cyl Two Wheel Drive Manual 150000 miles

When I start the car the abs light stays on, if I turn of the engine and then restart it the abs light goes out, I have noticed I have to tun the engine for about 20 seconds for this to happen.
Could you also tell me what the resistence reading should be from my wheel sensors

Many thanks In advance.

Yours Keith Stoker
February 8, 2008.

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