Wiper override Ml320 w164

[hog]

Hi can any tell how to bypass wiper switches and power through a new switch on dash just for when they don't work through wiper stalk .

PS see below


Hi have had problem with wipers not working! I have replaced Front Sam, Rear Sam water damage, wiper stalk , bonnet switch! So am at loss what to do next as none of the parts I have changed make any difference :wallbash:
Any ideas please.

 

[ajlsl600]

Under circumstances looks wiring issue?

 

[FiveAlive]

The modification that you want isn't going to be simple; even the wiper self-park is routed through the front SAM, plus the front SAM monitors the feed to the motor to check for the motor being stalled (e.g. by snow) so bypassing it might cause the SAM to get confused.

I assume that you've done basic checks to make sure that there is voltage getting to the motor when it is supposed to be running? And basic wiring resistance checks, as @ajlsl600 suggested.

Is the wiper motor itself any good? You don't list it as one of the replaced parts. As I inferred, if it is drawing the wrong amount of current (not sure if too much or too little for a stalled motor) then the SAM will shut it down. Also I imagine that this means that checking the voltage by disconnecting the wiper motor plug and probing the pins might be sending your fault-finding in the wrong direction.

 

[hog]

The modification that you want isn't going to be simple; even the wiper self-park is routed through the front SAM, plus the front SAM monitors the feed to the motor to check for the motor being stalled (e.g. by snow) so bypassing it might cause the SAM to get confused.

I assume that you've done basic checks to make sure that there is voltage getting to the motor when it is supposed to be running? And basic wiring resistance checks, as @ajlsl600 suggested.

Is the wiper motor itself any good? You don't list it as one of the replaced parts. As I inferred, if it is drawing the wrong amount of current (not sure if too much or too little for a stalled motor) then the SAM will shut it down. Also I imagine that this means that checking the voltage by disconnecting the wiper motor plug and probing the pins might be sending your fault-finding in the wrong direction.

Hi wiper motor works fine for days at a time and then nothing , switch off restart and they work again. Pulled plug but no voltage but plug backin and away they go ? Checked resistance on wires seem ok
thanks
Hog