Air Horn and City Horn Not Working VOLVO 670

Should look something like this http://www.amazon.com/Volvo-Truck-20377499-Solenoid-Valve/dp/B002LCD3EU. Also check fuse F18 on the electrical panel. Check this out http://www.volvotrucks.com/SiteColl...erating Instructions for Fuses and relays.pdf

 

Glad you fixed your horns. Can you post codes for abs? Could be a faulty wheel sensor. Also, I had an issue with mine that was caused by a loose wheel bearing on the drives. The loose bearing caused too much distance between the sensor and tone ring on the wheel

 

Hi! I need air horn solenoid too, can you help me and tell where is it? I have a 2005 vnl780 its probably the same as you? Thx

 

If your abs says operation failed make sure u check all your fuses possible someone removed fuse you should have 2 15 amp fuses is should say abs1 and abs2 I believe its between fuse 50 and fuse 60

 

Thanks nick956 that would help a bunch!! Really appreciate it

 

Hi guys,
I have a 2004 FM12 and also having problems with my horns.
I have replaced the contact ring under the steering wheel.
I am not getting any power down at the horns, Fuse 18 is ok and has power.
Where do I find the plug out of the cab that I can check power?
Does anyone have the wiring diagram, all I have is the attached.

Cheers

 

Also as FYI I have ran power direct from the battery and my electric horn works fine.