elclem1 Posted April 17 Report Share Posted April 17 Has anyone had a refurbed wiper motor as an exchange from moss? I swapped mine for a refurbed one at stoneleigh and it doesn't work. But the 3 wires that come out of it have no colour coding to match up to the wiring loom. Infact i am not sure what refurbed means anymore. Has anyone had the same experience? Quote Link to post Share on other sites
RogerH Posted April 17 Report Share Posted April 17 These motors are useless at the best of time. Send it back and get your money back Consider fitting a 14W TR6 motor - they actually work. To see your colours Remove the back plate and look inside - you should be able to so sheathing that is not sun bleached. Roger Quote Link to post Share on other sites
elclem1 Posted April 17 Author Report Share Posted April 17 Trying to keep it original but i did think about TR6 motor. i will have a look later. Quote Link to post Share on other sites
elclem1 Posted April 18 Author Report Share Posted April 18 UPDATE - so i have tested the new motor on a battery and it DOES work, fast speed is fine but slow speed turns so slowly that it wouldn't turn the wipers at all! Thanks for the heads up Roger - noted now. At least i have one speed - fast. but i paid to have a workable two speed motor so another call to moss. And life goes on! Quote Link to post Share on other sites
RogerH Posted April 18 Report Share Posted April 18 (edited) The slow speed is achieved by adding a 10 Ohm resistance wire in series with the field winding. If this wire burns out (and they do, quite easily) then the slow will die. Should the wire change its resistance then the speed may well change. With the back plate off you should be able to see the wire - with a test meter check the value of the resistance. A fixed 10 Ohm 5Watt resistor can be put in place. PS - this resistance reduces the torque of the motor. It really is quite useless. Roger Edited April 18 by RogerH Quote Link to post Share on other sites
RobH Posted April 18 Report Share Posted April 18 (edited) 1 hour ago, RogerH said: The slow speed is achieved by adding a 10 Ohm resistance wire in series with the field Not quite Roger - it's the fast speed that is obtained by weakening the field. "Eclem"- to get slow speed you MUST connect both 'slow' and 'fast' wires to earth at the same time. If you connect just the slow wire the resistance Roger mentions is put in series with the armature which is what eventually burns it out and is why the motor hardly runs. ( If it was still going round you probably haven't burnt the wire out yet. I guess you didn't have the motor body earthed either during your test , else the self-park wiper would have operated, making the speed go up and down. ). Edited April 18 by RobH Quote Link to post Share on other sites
RogerH Posted April 18 Report Share Posted April 18 Doh!! a senior moment and I'm only 74 Roger Quote Link to post Share on other sites
elclem1 Posted April 18 Author Report Share Posted April 18 Yes i had the motor earthed but not the two slow and fast wires together. that must be in the switch Quote Link to post Share on other sites
RobH Posted April 18 Report Share Posted April 18 Yes it is how the switch works. Quote Link to post Share on other sites
elclem1 Posted April 18 Author Report Share Posted April 18 Thanks will try after lunch Quote Link to post Share on other sites
elclem1 Posted April 18 Author Report Share Posted April 18 Rob, So indeed if you have slow and fast speed together then it does indeed turn at a slow speed the take away the slow speed and it works at faster speed i can get it to work off a battery but not on a switch i have a 3 connector switch but i can't get the slow and fast speed to connect at the same time. any suggestions? Cheers Clem Quote Link to post Share on other sites
RobH Posted April 18 Report Share Posted April 18 Sounds like you may have the wrong switch I'm afraid or else it is defective. The one for the DR3a motor is special and if that motor was original to your car your switch ought to be the right sort. The standard after-market switches sold for two-speed wipers don't work the right way and neither does the TR6 switch. Do you know the type number of what you have? Quote Link to post Share on other sites
RogerH Posted April 18 Report Share Posted April 18 Hi Clem the switch for this motor is a bit special. It is the same switching as the TR4A but a different body. BHA4578 TR4A switch BHA4578 Here TR5 wiper switch ~81, 82, 83 Here The above will work but not an ordinary switch Roger Quote Link to post Share on other sites
RogerH Posted April 18 Report Share Posted April 18 (edited) Hi Clem, if it is of any use the BHA4578 (pull switch) is also available as a toggle switch BHA4786 (MGB wiper swiych) Roger. Edited April 18 by RogerH Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 19 Report Share Posted April 19 The Clear Hooters 3 terminal wiper switch for TR5 is pretty much unique. I think It was also used on contemporary GT6 mk 2 I have never found a Lucas replacement switch with 3 terminals with the same internal connections as the TR5/250 rocker switch does. The US recall on Triumph wiper switches only offered the 4 terminal Lucas item, suitable for TR6 and the later 14w motor. There is/was a wiring diagram floating about that describes how to use a TR6 switch with 4 terminals with the 3 wire wiper motor in a TR5/250. Someone may have it and post Quote Link to post Share on other sites
RobH Posted April 19 Report Share Posted April 19 (edited) That was me Peter - you need the TR6 switch and a high current diode. These days I would use a big schottky diode (20SQ080) rather than the one shown. This shows it for a negative-earth system. Edited April 19 by RobH Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 19 Report Share Posted April 19 (edited) 6 minutes ago, RobH said: That was me Peter - you need the TR6 switch and a 6A diode. This shows it for a negative-earth system. Thank you. A lot more elegant and understandable than the one I found Edited April 19 by BlueTR3A-5EKT Quote Link to post Share on other sites
elclem1 Posted April 19 Author Report Share Posted April 19 Guys all of the info is priceless thank you i just need to purchase a couple of 6A diodes now - amazon here i come Quote Link to post Share on other sites
RogerH Posted April 19 Report Share Posted April 19 Hi Clem, if you can keep the wiring straight then use Rob's circuit If the wiring is a bit wrinkled then use Pete's circuit. Roger Quote Link to post Share on other sites
RobH Posted April 19 Report Share Posted April 19 57 minutes ago, elclem1 said: amazon here i come Before you do, see my later edit re the type of diode. The original will work OK but a Schottky has lower voltage drop so is better. Quote Link to post Share on other sites
elclem1 Posted April 19 Author Report Share Posted April 19 Hi rob been looking here in france but cannot find the 6A one don't suppose you have a link? Quote Link to post Share on other sites
RobH Posted April 19 Report Share Posted April 19 (edited) The ordinary ones are here : https://www.amazon.fr/diodes-redresseurs-6A05-6A10-axiales/dp/B08R7RRB9K/ref=sr_1_5?crid=1RY1L1T9CZRYF&dib=eyJ2IjoiMSJ9.WnFxB0KideRJwJcNuEi8q_l2nEkE-pRONxLGL_lBbouRRLOgcx8gwyaCcXYGMGlvD4mprtffjC4Qvq6eVtzNzzGgxFxyi18g5PTkMnf92RX7wTraVOrDOjnwzA9byKJHT4uX7tD5cy7QsWYMRLQ4apxSuzNsbStdXDNae0dfb1ghLpt91HRHYC12lCvnwt2Ad_y1gEXLw1Qxn2xnE8z_AW6SuZSv2FbnGq6s6srkzlfQqZSF1cRxcBRdBjiQv77F_k0TPLG6Rg3lQ_8TKm2K0e6c5u4h-OsuKwB1eX2DdCo.b1Q4ZSncluCe5ecYayg9Vr642MLdJ9okC7q_wobgGFM&dib_tag=se&keywords=diode%2B6a&qid=1713552038&sprefix=diode%2B6a%2Caps%2C107&sr=8-5&th=1 The schottky ones are also available from Amazon.fr - these are different numbers but will do the job. unfortunately you seem to have to buy a lot! : https://www.amazon.fr/BOJACK-schottky-protection-refusion-parallèle/dp/B07V4YJ25T/ref=sr_1_7?__mk_fr_FR=ÅMÅŽÕÑ&crid=14V1EKTYQJUQ1&dib=eyJ2IjoiMSJ9.IBTrFXkivxLHenGTd-hnXJ4xp9ZmMZiFv-qb7f8MG6GkqytNb8DKVFdm2JN2bDPaqBr4zQ6hCPYn7i-770REB7teYXOf2TvxQNc-r1egIPSL7wE3s0Yt3BKxcuPTAjqPTzHTRBacuoIbWLmRvi97f742ILiVpiSiTozvpDcb9se5QRwgHnV6URUOd4-L7XQAlsW6cZBao_fmUryvTHlCM-8nlsWS-Wuo1FBsMjT19cqbQIcIW2Bhtcdv5tzmwkhrhwiF4M5Jr2CmErAPbqXFFKhCVLkyFoxd6LLe8LV8IgM.CjpFY0TVnN5yPfTkOpQhngo65gPeLzSne33XrGTzQWk&dib_tag=se&keywords=diode+schottky&qid=1713552248&sprefix=diode+schottky%2Caps%2C133&sr=8-7 If all else fails I could send you one but the postage rate is absolutely extortionate ! Edited April 19 by RobH Quote Link to post Share on other sites
elclem1 Posted April 20 Author Report Share Posted April 20 Hi Rob thanks for the info, yes the postal prices are stupid now since BREXIT. Then there will be a custom charge at this end i have to pay or they take the package away. I no longer get stuff sent from the UK i wait until i am over visiting family and pick it up to bring back its like being in third world country now, but hey ho my choice. Once i have it all fitted and working i will post on here, thanks. Quote Link to post Share on other sites
Kiwifrog Posted April 20 Report Share Posted April 20 Normally Amazon take care of it he importation documentation and TVA when you buy through them, that has been my experience so no extra charges for customs, as you say buying from some Uk suppliers is a pain with the extravagant postage charges and extra customs clearance fees Quote Link to post Share on other sites
elclem1 Posted April 25 Author Report Share Posted April 25 Hi All so success I have fitted TR6 switch as suggested with the diode and i have two speeds. Thanks to everyone who contributed to this thread. In the end it was very simple to do with the knowledge. I have another TR5 to do and a friend who has a TR5 with a similar problem who i can now sort out. Many thanks again everyone I am a very, very happy smiley person! Clem Quote Link to post Share on other sites
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