07 International 9200 Wiper Issues

Ok, there is no body control module in a 9200. Prostars have bcm's. The timing of the intermittent signal is all controlled from a little logic board inside the wiper switch itself. For the park to work properly you should have constant power at the red wire at the wiper motor. This is also wire number 82C, gray in colour and goes to "M" terminal at the firewall connector. The power for this wire comes from breaker F4-D and is shared with the 30 terminal of the hi-speed wiper relay. In order for the wipers to park properly there is a switch that closes the red and blue wires together at the motor when the wipers are out of the park position. This power gets sent back out the blue wire which becomes 82-F, gray in colour and goes to "S" terminal at the firewall connector. This power goes to the 87A terminal of the low speed wiper relay which sends the power back out to the motor on the regular low speed circuit. When the wiper is in the park position the switch automatically opens inside the motor between the red and blue circuits. If your wipers do not park, either the red, (82-C) has no power to it, or the blue, (82-F) is open between the motor and low speed relay. Check the harness for rubbing through around the firewall and the wires leading up to the motor.

 

I have 2007 9400I wipers works on high only I can hear low and high relays kick in but low and intermittent does not work

 

Do they park properly? At the wiper plug, low speed power is on the green wire, or 82E. High speed is on Yellow or 82D. Ground is Black, or 82-gc. Park power is on Red or 82C and blue, or 82F sends park power back out to low speed circuit relay if wipers are out of park position. So, if you have power at the green and they don't park, I would say your low speed winding in the motor is toast.

 

No they donot park properly. I have power on the red wire 82c at wiper motor and not power to other wires at the motor.
At 82E firewall connector I have power
I think it’s in the harness between firewall connector and motor plug I didn’t understand M and S terminal from previous post

 

The "S" and "M" terminal are internal to the motor. It depends what diagram I am looking at the time, but they function the same. "Park" is the same as the "M" terminal, and "S" is for switch I am guessing. M or Park is the red wire. Switch or S is the blue wire. The way it works, park power is always there. The motor starts with low or high speed power on other wires. Once you stop or cancel your wipers, the power is lost and the wipers would stop where ever. To get them to park correctly, this is where park power takes over. Any time the wipers are not in the park position, the "switch" contact inside the motor is closed and supplying the motor with power from the park terminal. The switch rides on a little cam inside with a notch in it, and when the wipers are at the park position the switch hits the little notch on the cam and opens the switch, kills the power to the motor and stops them in the park position. So that is how that works. So I think you are right that you have a problem in the harness. For low speed, you need power at pin 87 of the low speed relay. When the relay clicks, it sends power to pin 30 and out wire 82E. At your firewall big octagon connecter at the right side of the truck, it is cavity O. To start, I would pull out the low speed relay and inspect for any burnt or melted plastic in the socket to make sure your pins are ok. Then, swap the relay with another to make sure the relay is actually good. Check for your powers and actually jump 87 to 30 if you need to and see if it works. If not you need to trace down where you are losing it. If you have a Cummins, that main harness runs along the top of the rocker cover and is coiled up at the firewall on the right hand side and has many spots where the harness can rub through there or on top of the engine and break a wire. So check that too.