2-Stroke

Has anyone run this to ground? I havent!

surfram

Same problem here. I hope someone figures it out.

Shorts

What was the result after trying this? https://www.dieseltruckresource.com/...l-t306312.html

2-Stroke

If anyone is still following this or has the same issues as above, I have figured it out.

It was NOT the MF switch for me, but rather the wiper motor assembly. I replaced the whole rack in mine and it as fixed the problem.

The reason I say this with certainty is that I took apart the old motor housing and found heavy wear on the control disc and it would make intermittent contact to tell the motor to wipe or not (e.g., when I hit a pot hole).

You could take yours apart and clean it and see if that would help, but I think it was nicer to just replace the whole rack, this way you get fresh bushings and joints and the wipers are much more quiet.

I did the replacement a couple years back, so sorry I didn't update the thread then.

organicfarmer

^^^ I had to replace the motor assembly as well [after the mf-switch DIDNT make a diff]

Green_Machine

This can also be a Front Control Module issue or a Integrated Power Module issue.

How it works is that the multi function switch outputs different resistances to the same 3 wires:

1 is a common
2 is 7 different resistances, which correspond to off-intermittent-low-high wiper speeds (this is why cleaning the mfs works sometimes, when dirty the resistance can get outside the specifications)
3 is for wash on/off

These resistances are read by the guage cluster, and converted to digital signals and sent to the FCM via the PCI bus. The FCM then controlls one relay for on/off and one for high/low in the Power Distribution Center and the motor starts.

The park contact in the motor itself doesn't maintain, then disconnect the power like in old school systems, it actually feeds into the FCM and then the FCM decides when to shut off the power to the motor. this is why replacing a motor would possibly cure the issue.


Chay

Hawglip

Mine did the same thing, even wiped when I unlocked the doors sometimes. I replaced the wiper motor and did the linkage at the same time since it was sloppy. That was last winter and it has worked perfect since then.