Check for bad earth on the dash board,instrument panel ,check senders. And wireing,
SOURCE: Speedometer work on and off on a 1997 850 Volvo
back of engine at the very bottom on the trans where the axle mount
SOURCE: air conditioner, fuel gauge, and temp gauge all stopped working at the same time
Three possibilities;
All related to blown fuses,
1- Fuse blown in the engine compartment LH.
2- Fuse blown in the cabin forward LH below the dashboard (below your legs left hand).
3- Fuse blown in the harness (wire bundles) below the dashboard very easy to reach with your hands “just look underneath steering wheel ".
U said " The air conditioner blows, but the air is not cold.
" Yes only the fan working which might receiving power independent all from those other mentioned things.
If all fuses OK. Then look for broken wires.
Regards;
MAR
SOURCE: 96 volvo 850 speedometer somtimes works then it drops to 0
Two questions: Is your odometer working? If not then it's probably a broken gear by the stepper motor that Emissionwiz mentioned. Is your ABS and/or TRACS light on intermittently or constantly. If so that is a common sign your ABS control module has gone or is going bad. This usually happens before the speedometer starts acting up. Either one of these will start intermittently and finally end up with the speedometer not functioning at all, and both are pretty common failures with this model.
SOURCE: 1997 Volvo 850 no power to the fuel pump. I do
pull off the fuse box cover under the hood. held down with 4 T25 screws. Replace the red relay.
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