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Old 05-19-2019, 01:34 AM   #1
Join Date: Apr 2019
Posts: 20
wipers don't work

IC E300, 2005, 206k, Alison transmission, DT466e engine

Hi. the wipers don't work. I checked all the fuses and both relays and they are all ok. What is next? If I only had a repair manual. Thank you
pratokko is offline   Reply With Quote
Old 05-19-2019, 04:12 AM   #2
Bus Nut
Join Date: May 2018
Location: topeka kansas
Posts: 776
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
not working

have you been able to "bypass" all the switches and wires and make the wiper motor/motors work on a direct wire mode?

You can trouble shoot by seeing what does work.

if you can hot wire motors directly, then back up and see if you can direct wire a relay to activate the motors

if you can do than then .... you get the idea.
magnakansas is offline   Reply With Quote
Old 05-20-2019, 11:01 PM   #3
Join Date: Apr 2019
Posts: 20

Hi. So the motor works fine. Also, the wipers go back to their resting position when I turn on the ignition (after I played around with the motor to get the wipers to stop in the middle of the windshield). Also, when I pull the wiper relay on the side of the bus and apply power to one of the contacts the wipers start working.

Oddly, there is no hot wire leading to the relay. It is my understanding that there should always be a hot wire which gets connected to another wire when the relay coil is activated.

Further surprising to me is that I don't hear a click on the relay (which I of course replaced) when the wipers get switched on. I am thinking that there may be 2 problems: the low amperage wire (from the switch) does not work to turn on the relay and the high amperage wire is not present. Any thoughts? thank you
pratokko is offline   Reply With Quote

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