This is the wiper arm sprayer mod for adding sprayers to the wiper arms of a TJ. GM cars and truck have this. The idea is to put wiper fluid directly onto the windshield as the blade wipes across the windshield. This helps with clearing the windshield on windy days and during heavy snow when the hood mounted sprayer might get covered. I have experience both problems often enough that the modification intrigued me. A quick trip to the junk yard and $7 later I have a big handful of GM sprayer nozzles, hoses and T's.
This became an education in the variety sprayer nozzles. The type I selected came off of a early-90's van. The middle piece below. It shoots water in three directions. Up, down and directly at the windshield. I blocked off the holes that sprayed down, because all they did was soak the hood.
Most of the nozzles have this little nub that needs to be cut away.
Find this retainer clip to help secure the hose to the wiper arm.
The nozzle is positioned so it is just below but not blocked by the wiper blade.
Remove the cowl and drill a hole.
This is easiest to do from the engine bay where there is a small dimple to the right of the bracket that hold the main wiring harness.
Image coming....
This tee fits through the new hole in the firewall.
Two water lines run from the tee to each wiper arm shaft.
Splice a tee into the factory water line.
Run a water line connecting the factory hose to the tee that passes into the cowl.
Replace the cowl cover and fit both water lines though the wiper arm holes. The 90* elbow serves as a quick release for all those time we remove our wipers and fold down the windshield.
Install the modded wiper arms and connect the new water lines.
You will now have a very clean windshield very quickly.
I added silicone to all the connections inside the cowl, just to make sure they stay sealed. I also kept the factory hood nozzle active. The pump has no trouble pushing all three sprayers.
A few days after, I drove 4 hours to Aspen during a heavy blizzard and the subsequent road spray combined with heavy winds. This was the perfect test. During similar conditions in the past, the wind could blow much of the spray away before hitting the windshield. The additional wiper fluid made quick work of the dirty salty mist that accumulates and quickly dries on the windshield.
This became an education in the variety sprayer nozzles. The type I selected came off of a early-90's van. The middle piece below. It shoots water in three directions. Up, down and directly at the windshield. I blocked off the holes that sprayed down, because all they did was soak the hood.
Most of the nozzles have this little nub that needs to be cut away.
Find this retainer clip to help secure the hose to the wiper arm.
The nozzle is positioned so it is just below but not blocked by the wiper blade.
Remove the cowl and drill a hole.
This is easiest to do from the engine bay where there is a small dimple to the right of the bracket that hold the main wiring harness.
Image coming....
This tee fits through the new hole in the firewall.
Two water lines run from the tee to each wiper arm shaft.
Splice a tee into the factory water line.
Run a water line connecting the factory hose to the tee that passes into the cowl.
Replace the cowl cover and fit both water lines though the wiper arm holes. The 90* elbow serves as a quick release for all those time we remove our wipers and fold down the windshield.
Install the modded wiper arms and connect the new water lines.
You will now have a very clean windshield very quickly.
I added silicone to all the connections inside the cowl, just to make sure they stay sealed. I also kept the factory hood nozzle active. The pump has no trouble pushing all three sprayers.
A few days after, I drove 4 hours to Aspen during a heavy blizzard and the subsequent road spray combined with heavy winds. This was the perfect test. During similar conditions in the past, the wind could blow much of the spray away before hitting the windshield. The additional wiper fluid made quick work of the dirty salty mist that accumulates and quickly dries on the windshield.
