Richardtr3a Posted April 26 Author Report Share Posted April 26 I have just been out and checked my existing relay. I have the screw eyelet version. I am keen on yours. I nearly bought one yesterday and thought that I would ask for advice here on the Forum. Thanks Richard & B Quote Link to post Share on other sites
Richardtr3a Posted April 27 Author Report Share Posted April 27 Is there any supplier who sells an overdrive modern relay with the Eyelet connections. I could buy a Durite which would work well but needs new connections and I would have to start soldering . It is in a very cramped space near the heater and gearbox. Rob H found me a useful supply and I was about to buy it . I am now looking for a different relay. I need the eyelet fittings to avoid the electrical work. Thanks Richard & B Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 27 Report Share Posted April 27 How about replacing the existing screw eyelet terminal loom for one with Lucar terminals already fitted? Then use a Durite Lucar terminal relay. Loom. Is pt no 131338. https://motaclan.com/product/loom-overdrive-switch-relaytr_131338_1688_0/ Alternative ADD a modern plug in relay with pre wired socket. Run the new wires of the pre wired socket to your existing relay eyelet terminals and use the old relay and its existing wiring as a junction box? Prewired socket and 30 amp modern relay with fuse. https://www.ebay.co.uk/itm/164795155511?itmmeta=01HWFZYX6MDJ6V76P0SS6GF03X&hash=item265e8e8437:g:8sEAAOSwjjRbbs4B&itmprp=enc%3AAQAJAAAA8JyhQ5CkiaOjL8Em76aWph4niZuQMQFAA07FifTvP9duWTn8OTcj3Sy55xZQfdc%2B9U1aXCu1SWtuC57MZOF4k9ll8z66YgsfQf6kuzq%2BytCIwHJBAg%2B1PoXrP0Xx09VuOX9%2F6RszKlR%2FmFuvrPX4FjuWE6KV7Jn3zUugCBGDEks3Idf09vrkA%2BJfXUNlZooYn0XcuZDdWCiDQN3BR9y%2B6Ym3avgkWqVvQNlB6bSzwy49QdGwuSF20pnnK9zVDtV2a4spCEwzpjHT1uZeXAfdyJJUAh%2BLyLFMVUX8vcFtUproj6iaBD7sb6lp6k9v3qZBVQ%3D%3D|tkp%3ABk9SR7zT-__jYw Quote Link to post Share on other sites
Lebro Posted April 27 Report Share Posted April 27 Or, (since the old relay does "click") then it just needs to be opened up (peel back the lip of aluminium) & clean up the contacts. be good for another 60 years Bob Quote Link to post Share on other sites
Richardtr3a Posted April 27 Author Report Share Posted April 27 (edited) How many amps , 30 or 40 , should the new relay have to work and does it need a diode for protection ? The prewired sockets look like a good answer. Thanks for the advice Richard & B Edited April 28 by Richardtr3a correct amps Quote Link to post Share on other sites
RobH Posted April 27 Report Share Posted April 27 (edited) The A-type OD draws 20A or so. A standard 30A relay will be fine. You don't really need one with a commutation diode but it wouldn't hurt as it helps to prevent contact burning on the switches. (The diode reduces the back-emf voltage spike as the relay turns off ). It does add a complication though. A relay with a diode has to be wired in the right way round as the wiring convention for these relays is intended for negative earth systems. The cathode of the diode is always wired to pin 86 meaning this has to be the positive supply end and pin 85 the negative earthy end. On a positive-earth car this means the connections must be reversed. The white supply wire from the ignition switch must go to pin 85, with 86 connected to the yellow wire from the OD switch. Edited April 27 by RobH Quote Link to post Share on other sites
Richardtr3a Posted April 28 Author Report Share Posted April 28 Thanks very much for the positive earth instructions. I will report back here after I have the relay disconnected when the rain stops and the drive is dry. Richard & B Quote Link to post Share on other sites
Kiwifrog Posted April 28 Report Share Posted April 28 Another advantage of a modern relay is that you can get them with standard replaceable modern fuses built in, something that I used for my electric fan on my car 30 amp fused relay Quote Link to post Share on other sites
roy53 Posted April 28 Report Share Posted April 28 When i fitted strap 89 that stopped the rattle noise to mine along with the spring and plunger . Quote Link to post Share on other sites
Richardtr3a Posted April 28 Author Report Share Posted April 28 22 hours ago, BlueTR3A-5EKT said: How about replacing the existing screw eyelet terminal loom for one with Lucar terminals already fitted? Then use a Durite Lucar terminal relay. Loom. Is pt no 131338. https://motaclan.com/product/loom-overdrive-switch-relaytr_131338_1688_0/ Alternative ADD a modern plug in relay with pre wired socket. Run the new wires of the pre wired socket to your existing relay eyelet terminals and use the old relay and its existing wiring as a junction box? Prewired socket and 30 amp modern relay with fuse. https://www.ebay.co.uk/itm/164795155511?itmmeta=01HWFZYX6MDJ6V76P0SS6GF03X&hash=item265e8e8437:g:8sEAAOSwjjRbbs4B&itmprp=enc%3AAQAJAAAA8JyhQ5CkiaOjL8Em76aWph4niZuQMQFAA07FifTvP9duWTn8OTcj3Sy55xZQfdc%2B9U1aXCu1SWtuC57MZOF4k9ll8z66YgsfQf6kuzq%2BytCIwHJBAg%2B1PoXrP0Xx09VuOX9%2F6RszKlR%2FmFuvrPX4FjuWE6KV7Jn3zUugCBGDEks3Idf09vrkA%2BJfXUNlZooYn0XcuZDdWCiDQN3BR9y%2B6Ym3avgkWqVvQNlB6bSzwy49QdGwuSF20pnnK9zVDtV2a4spCEwzpjHT1uZeXAfdyJJUAh%2BLyLFMVUX8vcFtUproj6iaBD7sb6lp6k9v3qZBVQ%3D%3D|tkp%3ABk9SR7zT-__jYw Thanks for the link to the fused relay prewired. This seems like a straight forward answer . Today I tried to turn the screws making my existing relay connections and they turned well. Is this modern relay ok for positive earth? It does not have a diode and looks simple to fit. I will need some instructions on connecting C1,C2, W1,W2 to 10,85,86,87. I plan to buy this one tomorrow Richard & B Quote Link to post Share on other sites
Lebro Posted April 28 Report Share Posted April 28 As Rob said above : For modern relays the connection terminals are numbered rather than letters and the equivalents to the original are: C1=30. (brown/white wire), C2=87 (yellow/purple), W1=86 (white), W2= 85 (yellow/green) Quote Link to post Share on other sites
Richardtr3a Posted April 28 Author Report Share Posted April 28 Thanks for the link. I must spend more time on the Forum. I was in a hurry to get out in the local fields before any rain. The sky has cleared and tomorrow looks hopeful in the garage. Richard & B Quote Link to post Share on other sites
Kiwifrog Posted April 28 Report Share Posted April 28 5 hours ago, Richardtr3a said: Is this modern relay ok for positive earth? It does not have a diode and looks simple to fit. I will need some instructions Relays without diode protection /bypass are not sensitive to polarity. They can be used on positive or negative earth circuits without changing the connections Quote Link to post Share on other sites
Richardtr3a Posted April 29 Author Report Share Posted April 29 Thanks Kiwifrog. I am planning to buy the relay this morning and fit it asap. Richard & B Quote Link to post Share on other sites
Richardtr3a Posted April 29 Author Report Share Posted April 29 Delivery will be Wed/Thurs. Looking forward to it. Quote Link to post Share on other sites
Richardtr3a Posted Friday at 05:55 PM Author Report Share Posted Friday at 05:55 PM Today I was out in the garage at last to deal with the overdrive. It was fine weather and a burst of enthusiasm. The new relay had a socket and I fitted a small connection to each of the four wires. The gearbox tunnel is out and I fitted the wires as per the Forum messages. The existing wires had some masking tape with the number of the original relay contact. It took a long time because I had to lie under the dashboard and remove and refit the small screws on the original relay. It is awkward to reach them anyway. The last connection was C1 to 30 . I noticed when starting to remove the small screw on C1 that there was no wire attached to C1. There was a small length of wire with a masking tape note C1. So I fitted a new small connection to the original wire fitted both cables to the original relay. I tried the o/d switch and the solenoid moved !!! So I decided to give it a road test before fitting the gearbox cover. The overdrive was in full working order. The new relay will now live in the spare parts department. This is an amazing result because the o/d stopped working last Christmas and I have been waiting for a repair before I send the gearbox and overdrive away for a full rebuild. I was concerned about the full cost ? Sometimes days in the garage work out really well. Tomorrow I will bolt down the gearbox cover which I remember was difficult last time , when I was much younger ! Thanks for the advice Richard & B Quote Link to post Share on other sites
John Morrison Posted Friday at 07:09 PM Report Share Posted Friday at 07:09 PM Result! Congratulations John. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted Sunday at 01:22 PM Report Share Posted Sunday at 01:22 PM On 5/3/2024 at 8:09 PM, John Morrison said: Result! Congratulations John. +1 Quote Link to post Share on other sites
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