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earlyrolla
Regular


Location:
Perth
Registered:
May 2003
Re: Three speed wipers on RA28 Sun, 11 September 2005 11:46 Go to previous messageGo to previous message
I transplanted the later RA40 unit with intermittent wipers into an early RA40 without intermittent wipers.

I found it very interesting that Toyota used a special little box to generate the intermittent signal, from tht outside it looks just like a relay. Inside there is a motor geared down to a little cam and a set of contacts. Basically the cam opens and closes the contacts as the motor rotates but it is slow enough to only give a pulse every 'x' seconds. Hence providing the intermittent wiper signal. There is no change to the original wiper motor and this box just plugged into the fuse box area - already a slot there for it. It should be pretty easy to adapt to the RA28.

At a guess the Jaycar kit would probably use a 555 timer circuit to generate a pulse to trigger the wiper motor where the frequency of the pulses is variable by a pot (potentiometer) so that rate of the intermittent wipers is variable. This system could be used with any factory wiper installation. Well except vacuum operated wipers Smile
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SubjectPosterDate
Read Message   Three speed wipers on RA28 Maurice cSun, 04 September 2005 13:16
Read Message   Re: Three speed wipers on RA28 TurboRA28Sun, 04 September 2005 23:39
Read Message   Re: Three speed wipers on RA28 Steve MMon, 05 September 2005 06:37
Read Message   Re: Three speed wipers on RA28 TA-022Mon, 05 September 2005 06:55
Read Message   Re: Three speed wipers on RA28 TOY77Mon, 05 September 2005 09:26
Read Message   Re: Three speed wipers on RA28 jeffro RA28Mon, 05 September 2005 10:20
Read Message   Re: Three speed wipers on RA28 Maurice cMon, 05 September 2005 11:26
Read Message   Re: Three speed wipers on RA28 TOY77Tue, 06 September 2005 08:08
Read Message   Re: Three speed wipers on RA28 hickoz_broSun, 11 September 2005 10:04
Read Message   Re: Three speed wipers on RA28 omegamanSun, 11 September 2005 10:29
Read Message   Re: Three speed wipers on RA28  earlyrollaSun, 11 September 2005 11:46
Read Message   Re: Three speed wipers on RA28 Maurice cSun, 11 September 2005 16:19
Read Message   Re: Three speed wipers on RA28 TA-022Sun, 11 September 2005 23:50
Read Message   Re: Three speed wipers on RA28 thechucksterMon, 12 September 2005 04:53
Read Message   Re: Three speed wipers on RA28 benmeyerMon, 12 September 2005 05:34
Read Message   Re: Three speed wipers on RA28 thechucksterMon, 12 September 2005 05:39
Read Message   Re: Three speed wipers on RA28 Maurice cTue, 13 September 2005 18:30
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