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There is no relay for the horn!
BOTH - 21" (inches)
It is under the plastic cowling where the wiper arms are at.
Look at http://www.volvoclub.org.uk/tech/service/850/WiperWasherSystem.pdf It says it all for a 850!
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.
21 inches - both driver and passenger sides.
Replace wiper blade and carefully bend wiper arm so it makes good contact with windshield
The horn relay is the same as the wiper relay, it's located under the fusebox under the hood next to the driver side hinge. the fuse box comes out & there's another box attached to the bottom. it has a bunch of relays, the horn/wiper relay is in the top row, 3rd from the left (or 2nd from the right). if you're having trouble w/ the horn, and the intermittent wiper still works, it's probably the horn contacts in the steering wheel.
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