yellow up arrow on dashboard

[pablis47]

Hello, I am new to the forum. I changed with a friend the gear for the odometer, and when we reassembled the instrument cluster, a yellow upward arrow showed up. I think perhaps reconnected something wrong. What is this light, and could it be disconnected? I have a manual five speed (no overdrive) transmission. Thanks for your advice! Pablis

[billofdurham]

Welcome to Matthew's Volvo Site.

On the manual transmission cars that light is the shift indicator light. This extract from the owner's manual describes what it does and how to re-programme it if you have disconnected the battery.

Shift indicator light
(manual transmission models only)
The Volvo shift indicator light (S.I.L.) is a device designed to help you get even better gas mileage from your Volvo car. Studies have shown that the best fuel economy is obtained by shifting gears at low engine rpm and high relative engine load. The Volvo S.I.L. is calibrated to show you when to shift for improved mileage without sacrificing smooth acceleration.

Use of the S.I.L. is simple. Shift to next higher gear as soon as the light comes on. You may find after using the S.I.L. for some time that your natural shifting rhythm will adapt to the S.I.L.'s suggestion. Some drivers may even shift before the light comes on.
Obviously, there will be times when you need to shift later than the light would indicate (for example, when climbing hills or trailer towing). Using the light regularly, however, should result in a mileage improvement of six percent or more, depending on how you normally drive.

Programming instructions for shift indicator
If the current supply to the control unit is cut (battery disconnected), the control unit will have to be re-programmed as the control unit memory will be erased.
Drive the car in each gear (first gear not necessary) for approximately 8 seconds. The gear change indicator light will flicker once (0.5 seconds), as each gear is programmed.

Note: Remove foot completely from the clutch pedal after each gear change when programming the control unit.

If re-programming doesn't work, take the bulb out. In my opinion it is one of those useless gadgets car manufacturers come up with from time to time.

Bill.