The headlight washers & wipers will automatically work for 2 "sweeps" when the windscreen washers are operated. You should be able to see them moving across the beam pattern against a wall or with a 2nd person observing. You cannot operate them separately.
If they do not work - further investigation will be required ( fuses, seized motors etc ).
We have a 2002 S-80. The headlight wipers work automatically when you use your windshield washer fluid to wash your windshield.
I believe that normally headlight wipers only work occasionally, at set intervals when the car thinks that they may be dirty.
Begin by removing the wiring harness from the back of 2004 Volvo headlight. Remove the headlight assembly retaining bolts. Reverse the process to install your new headlight assembly.
this should help: http://www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=14819
The 2004 Volvo XC70 has 20 valves.
The 2004 Volvo S80 has 20 valves.
The 2004 Volvo S60 has 20 valves.
The 2004 Volvo C70 has 20 valves.
The 2004 Volvo XC90 has 20 valves.
The 2004 Volvo C70 is a gas-powered vehicle.
The 2004 Volvo S80 is a gas-powered vehicle.
The 2004 Volvo XC70 is a gas-powered vehicle.