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Replacement VT Commodore wiper motor won't park

Hi All,

I have a VT Commodore wiper motor wired to a universal wiper switch with 4 pins - battery
- low speed
- high speed
- park
I have connected the wiper motor as - red to low speed
- green to high speed
- black to earth
- yellow to park
The remaining brown wire is not attached.
The wipers work but won't park when switched off. The park pin at the switch has constant power to it when the switch is in the off position. Can anyone explain what I am doing wrong. Any help would be greatly appreciated. CHEERS

Model: 

Comments

the yellow wire should be at 12V so that sounds right. What about the motor itself - what is the history and was it working and parking when it was connected to the car it came off? What was the brown wire for the motor for - in the commodore it goes to the BCM - dwell?

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Andrew

Wipers were working fine from he donor VT. I don't understand the dwell or how things work with it. I thought the park wire needed power to complete a wipe when the switch was turned off. Any ideas.

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yep the park wire needs power, even when wiper switch is turned to off..the power to motor is switched off internally by the park switch, so either that switch is not working, its not earthing internally or you are losing power to the park circuit when you switch the wiper switch off...is the motor just stopping or is it continuing to run? Ps if you have a spare fuse try connecting that spare brown wire to earth and then power and see if the circuit works properly...if you inadvertently create a short the fuse should blow....I don't have a wiring diagram for a VT but looking on line I came across a post that listed this for a Commodore wiper motor - Red lo, Black Earth, yellow Park, Brown Power and Green Hi...so that suggests you need to connect that Brown to power

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Andrew

Knowing how much the old units relied on an earth strap, I'm thinking lack of earth.

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im thinking his earth is ok because he states it works ok on lo and hi and it needs a good earth to do that. When you turn the switch to off you still have power to the Lo speed brush via the yellow wire to run the motor which then switches internally when the wipers get to the park position. so I'm thinking the internal switch (mechanical) within the motor is not working or the earth wire connection on that internal switch is not working good enough. I had this problem on my HR wiper motor. It would not park and I had to resolder the internal ground wire connection.

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Andrew

Thanks for your help, I’ll check the motor out again, it was working but has been sitting for awhile

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A mate was taking his Toyota for RWC, wipers worked but did not park, I told him spray all the connections at the motor with some electronic clean up spray..fixed it.

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Cheers, Lindsay.

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