Question about 1992 Volvo 240

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1992 volvo 240

My service light on the dash comes on for a minute then cuts off when i drive a bit. and my overdrive light never goes out, it stay on constantly and never shifts 2 overdrive when i'm on the highway.

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  • Anonymous Jan 07, 2009

    I have a 1992 Volvo 240 wagon with the same issue that it will not shift into O/D on the highway. Having the relay and Solenoid checked tomorrow but have also been concerned about a high pitch whining noise from the shift area that goes higher when you speed up and lower when you slow down. May be time to put a bullet in the grill !  - Ian

  • dadio_91 Mar 17, 2009

    my overdrive light never goes out, it stay on constantly and never shifts 2 overdrive when i'm on the highway and the relay makes a humming noise that follows the rpm of the engine



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The service light is a reminder for you to have the car serviced, it can be reset, and it will come on again in 5,000 miles or so.

The overdrive light may be caused by the wiring to the overdrive solenoid on the transmission, or the relay. Just be sure the wiring is ok before replacing the relay, or you can damage the new relay.


Posted on Nov 28, 2008


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The failure of the relay for the overdrive is a common problem with this vehicle. However, before you replace it, the wiring that goes to the overdrive solenoid needs to be checked. It tends to rub on the transmission housing, and then it shorts out the relay. If you replace the relay without fixing this, it will destroy the new relay!

To access the relay, pull the glove box housing, an it's right behind the center console.


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