Wiper motors

[nauticalnick]

l've noticed that the wiper motors have 3 contacts on them. 2 are currently used ( + & -, l presume ). Is the other one for 2 speed or self park and if it's self park how is it wired ?

Self park would be a bonus.

Any help or advice would, as usual be greatly appreciated.

Thanks,

Nick

[Sula]

If there is a self-park facility, I expect there would be three connections -
- one return/earth,
- one 'continuous' live (e.g. on whenever the battery is on), which is interrupted internally whenever the wiper is in the park position, and
- one switched live (i.e via your wiper button or switch).

Do you know what make your wiper motor is?

[nauticalnick]

Thanks for that information.

Unfortunately l don't know the make and so far l have not seen any markings on it - apart from the colour which is black. l'm down at the boat today so l'll have a closer look.

Regards,

Nick

[nauticalnick]

l can't see any markings on the wiper without removing it.

The wiring, however appears to be as you suggested:
-left terminal marked +
-middle one marked - ( earth/return )
-right terminal marked s
The middle and the righthand one are wired up so running a live to the terminal marked '+' should make the wiper self park ?

Regards,

Nick

[Sula]

Apr 11, 2017 6:53:52 GMT nauticalnick said:

l can't see any markings on the wiper without removing it.

The wiring, however appears to be as you suggested:
-left terminal marked +
-middle one marked - ( earth/return )
-right terminal marked s
The middle and the righthand one are wired up so running a live to the terminal marked '+' should make the wiper self park ?

Regards,

Nick

{Deleted to avoid confusion and blown fuses!]

This should mean that anytime you want the wiper on, you use the wiper switch, and when you turn it off the wiper will continue until it reaches the park position, then stop.

Good luck!

In next week's instalment: how to get it to do variable speed, intermittent wipe, and enabling the secret cocoa dispensing function!

[nauticalnick]

Thanks for the detail.

Just to clarify the terminal marked '+' is not wired to anything. The '-' is wired as the return and the 's' terminal comes from the switch, well l presume it does as it is the same colour wire leaving the switch ! Anyway l'll follow instructions 1 to 6 leaving out no. 4.

So next time l'm at the boat l'll give it a go and report back.

Intermittent wipe would be good but not too sure about the secret coca dispensing function !!

Regards,

Nick

[jeffstrud]

HI
Re wiper self parking Google wiper motor wiring self parking loads of info and wiring diagrams. But in principle self park works via an internal contact which shorts out the armature when the wiper is switched off,

[Sula]

Apr 13, 2017 6:32:43 GMT nauticalnick said:

Just to clarify the terminal marked '+' is not wired to anything. 

Ah, sorry!  I misread what you previously wrote. 

[Sula]

IMPORTANT ALERT!

I have now discovered that the switching is sometimes (at least on Roca brand motors) on the negative/earth side, not the live side. I have therefore deleted the previous suggestions as they could have resulted in a blown fuse at stage 6 for any one else (Sorry!), but as you already have them connected and not blowing fuses, yours is presumably wired with a common earth and switched live, as I first suspected.

I show below what the Roca (negative side switching) should be. For YOUR situation, Nick (and that of anyone else with common earth and switched live arrangement motor), I think if you move the wire from the switch from the S terminal to the + terminal and turn it on the wiper will move from non-parked to park then stop.

If that is the case, you need to replace the switched wire back to the S terminal, and run a new wire from the unswitched side of the wiper switch to the + terminal.

Let me know how you get on. (Take spare fuses!)

The connections shown by ROCA (which curiously have a common, fused live and switched earth) are -

FOR NON-SELF PARK (2 WIRE) OPERATION
i) (fused) live/positive to + terminal
ii) switched connection from negative/earth to S terminal

FOR SELF-PARK (3 WIRE) OPERATION
i) as above
ii) as above
iii) direct connection to earth.

[nauticalnick]

Thanks for the update and revised instructions. l will do as you suggest to see if the motor is of the self park type and report back.

It might not be this weekend as the 'First mate' is wanting to spend a day on board cleaning and inspecting etc so that may well put this task on the back burner for a few days !

Thanks for the info and contributions so far.

Nick