Check and change the relay
There is no relay for the horn!
http://www.swedishautoparts.com/850/volvo-850-electrical-parts.html Try this website for a pdf. Hope it helps, Troy
You have to remove the glove-box. You will find the relay back - to left.
the relay is located within the hazzard flasher switch. If faulty replace flasher switch and it will sort out the problem
i dont know i came here for the answer
Do you have your terminology right....The injector relay would be the computer right??? The fuel pump relay could cause that problem!!!! good luck and let me know
There's no Volvo 850 2000. What you likely saw was a S70.
In the housing of the hazard dash switch, you can unmount it pulling it forward out of the dash.
Volvo heater relay93 Volvo 850 heater motor relay is on the heater box towards center of car. That is without the digital climate control. There are two relays side by side, my relay has bad points and a blue cover. The resistor pack could also be your problem, it is on/in the heater box also. The heater box is below the glove box in front of passengers knees. The Dealership refers to the resistor as a power unit (for auto climate control) systems. When this fails, the blower motor will not work. No heat or A/C. A different resistor is required for manual climate systems. To access this unit, you will need to remove the the glove box , the support bracket for S.R.S (passenger side) , and possibly the wire harness. There should be left of the blower motor, the resistor. New up to $300. salvage yard $6-25. Try Crazy rays
Check your fuses. There is a separate fuse for high speed.
towards the front left end of the fuse box it should be fuse number 12.