PXC Posted September 15 Report Share Posted September 15 Hi can anyone help with my heater wiring. It is not connected and there is no heater switch, but I can sort that when I know what the wires do. There are three wires coming from the bottom of the heater. A white, (cut off), a brown (disconnected) and a black seems to go off into the loom under the dash. photos attached. Thanks Paul Quote Link to post Share on other sites
RobH Posted September 15 Report Share Posted September 15 It may be that someone has replaced the motor Paul - those wires don't seem to be standard. There is a replacement Clayton motor which has brown and black wires so it could be one of those. Try +12 v on the brown, black should be earth. If the fan blows the wrong way, swap the connections over - the Clayton motor is permanent magnet so is polarity sensitive. The white wire may be something left over from the original motor. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted September 15 Report Share Posted September 15 (edited) Firstly I’d say that is not an original heater assembly Two black wires to the fan motor. One wire to power the other to earth. On a side screen TR the heater is controlled from the battery supply through a rheostat that is from off then variable through fast down to slow The extra couple of wires you have are probably a direct connection to the motor and the other through an integral resistance coil. All very TR6. Edited September 15 by BlueTR3A-5EKT Quote Link to post Share on other sites
PXC Posted September 15 Author Report Share Posted September 15 3 minutes ago, BlueTR3A-5EKT said: Firstly I’d say that is not an original heater assembly Two black wires to the fan motor. One wire to power the other to earth. On a side screen TR the heater is controlled from the battery supply through a rheostat that is from off then variable through fast down to slow The extra couple of wires you have are probably a direct connection to the motor and the other through an integral resistance coil. All very TR6. Integral resistance coil - yes there is something green inside that you can see through the open heater flap. Could be a resistor. Quote Link to post Share on other sites
rcreweread Posted September 15 Report Share Posted September 15 Isn’t that a 2 speed fan motor from a later TR5/6 model - the black being an earth and the other two being the 2 speeds power? cheers Rich Quote Link to post Share on other sites
RobH Posted September 15 Report Share Posted September 15 7 minutes ago, rcreweread said: Isn’t that a 2 speed fan motor from a later TR5/6 model - It might be but the wire colours are wrong for that according to the Advance Autowire info. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted September 15 Report Share Posted September 15 20 minutes ago, PXC said: Integral resistance coil - yes there is something green inside that you can see through the open heater flap. Could be a resistor. Let’s go back now to the curious slide switch on your dash with 3 wires……..one power supply. The others feeding the other two wires onto the heater resistor. Quote Link to post Share on other sites
PXC Posted September 15 Author Report Share Posted September 15 Possibly connected to the slide switch. I’ll try to match up the remnants of the wires. It’s definitely a Smiths motor on it, and a Smiths heater box. Looks like 15amp, FHM 4442/02.B possibly. Quote Link to post Share on other sites
PXC Posted September 15 Author Report Share Posted September 15 1 hour ago, BlueTR3A-5EKT said: Firstly I’d say that is not an original heater assembly Two black wires to the fan motor. One wire to power the other to earth. On a side screen TR the heater is controlled from the battery supply through a rheostat that is from off then variable through fast down to slow The extra couple of wires you have are probably a direct connection to the motor and the other through an integral resistance coil. All very TR6. Yes the latest photos show a pair of black wires going into the motor. there are three wires exiting a grommet which are the three I mentioned in earlier post. The black one is one of the ones which goes back into the motor, along with another black wire. Quote Link to post Share on other sites
PXC Posted October 10 Author Report Share Posted October 10 Still working on this issue. Does anyone know if this Smiths motor is permanent magnet, or field coils? Quote Link to post Share on other sites
Lebro Posted October 10 Report Share Posted October 10 Field coils. Bob Quote Link to post Share on other sites
PXC Posted October 11 Author Report Share Posted October 11 Hi Bob thanks. As an aside - took my 3A out in the dark last night with my all new led lighting. Superb visibility. Apart from a half hour “rest” in the petrol station with a completely dead electrical system. Was rescued by my wife with some tools and a head torch. Solved the problem, just some loose failing wires round the fuse box/regulator. which leads my to another question- mine needs a full rewire - is it possible to stitch a new loom into the car bit by bit, without dismantling too much. That is, install the new loom not as part of a full strip down /rebuild? Regards Paul Quote Link to post Share on other sites
Kiwifrog Posted October 11 Report Share Posted October 11 Most of the loom is in the engine bay and behind the dash, I would have thought removing the dash center section and large gauges would be the minimum to rewire the car, along with removing the grille to get at the headlights sidelights and indicators. The loom to the rear runs through the interior of the car under the carpet, the fuel tank sender and earth might be a little tricky but doable without disassembly the rear lights are easy to get at. cheers Alan Quote Link to post Share on other sites
PXC Posted October 11 Author Report Share Posted October 11 Thanks Alan. I’ve been in most of those places already for one reason or another - either lighting or chasing down “improvements“ to wiring done by POs. Regards Paul Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 11 Report Share Posted October 11 4 hours ago, PXC said: Hi Bob thanks. As an aside - took my 3A out in the dark last night with my all new led lighting. Superb visibility. Apart from a half hour “rest” in the petrol station with a completely dead electrical system. Was rescued by my wife with some tools and a head torch. Solved the problem, just some loose failing wires round the fuse box/regulator. which leads my to another question- mine needs a full rewire - is it possible to stitch a new loom into the car bit by bit, without dismantling too much. That is, install the new loom not as part of a full strip down /rebuild? Regards Paul Yes, as stated above. Be sure you have the correct wiring diagram for the model of car you are wiring. The most commonly found issue is the change of wiper motor between self parking and non self parking type. That change happened in TR3 so be sure to follow the TR3A diagram if you car has the self Parker, which it should as a 1959 TR3A. . Your car may or may not have a rheostat on the panel lights. So don’t panic. http://www.advanceautowire.com/tr24a.pdf Quote Link to post Share on other sites
PXC Posted October 13 Author Report Share Posted October 13 Hi back to the heater motor. I have got the heater off, and the motor off. Eextracted it and opened it up. It’s completely burnt out - no point trying to fix that! So I’m on the look out for a replacement motor. and yes it does have a resistance coil inside the heater box, so I guess that makes it a two speed heater I reckon. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 13 Report Share Posted October 13 The company with the Smiths tooling that make heaters and their motors. https://www.mg-cars.org.uk/ah/ Quote Link to post Share on other sites
PXC Posted November 2 Author Report Share Posted November 2 Still no luck down that route. Can’t get a response from Ashley Hinton using the email or the contact form. Quote Link to post Share on other sites
RogerH Posted November 2 Report Share Posted November 2 Hi Paul, is this any good https://www.ebay.co.uk/itm/186750087153?_skw=Triumph+TR3+heater+motor&itmmeta=01JBQ9MHFZJ8B7JKEAX0JTW91H&hash=item2b7b2c2ff1:g:rPwAAOSwehxl~r3k&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKlZw%2BhEzAX8Swz%2F%2BLVNpTOuoj%2Fm89YcYKTwUikq666S1D9XD0Zmzq65JwtKr322GmWFjIxujAMhXr8BjHeD1V84qUSHIIAZokWDqKs%2B3pWB2UGmHGq75Z4PLhN%2BGIvkfn%2FBw9%2BQokbbdkxWyqy6mWLw5a5tpy%2BVV5AlAm3%2B26QudbCKiEyg9--4LSyOvdrKMU0PEP%2BCSY2hmpgl4aiaQZ85BeEJuvm0CUTPcZICMfCRY9eBA3nQ6ZzPD2t39dP4ZJwa7sKYLaJLZclzGhg2q4Ufwt4VInSy%2FmFhuUOn1oFJaQ%3D%3D|tkp%3ABk9SR4yY0undZA Roger Quote Link to post Share on other sites
PXC Posted November 3 Author Report Share Posted November 3 Could be. I’ve got one coming from eBay, and my eye on another if that one’s not right. There are so many variants. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted November 3 Report Share Posted November 3 (edited) I had a new one that looks just like yours. No use to you though as it is 24 v its from a lightweight Land Rover. Edited November 3 by BlueTR3A-5EKT Quote Link to post Share on other sites
Lebro Posted November 3 Report Share Posted November 3 (edited) My Air tansportable (Lightweight) Landie was 12V ? Bob Edited November 3 by Lebro Quote Link to post Share on other sites
BlueTR3A-5EKT Posted November 3 Report Share Posted November 3 6 minutes ago, Lebro said: My Air tansportable (Lightweight) Landie was 12V ? Bob Not the one my friend bought off the MOD. It was a radio operations vehicle and had a screened ignition circuit , looked like Aeroquip braided HT leads. https://www.lightweightlandroverclub.org/lightweight-history.html Quote Link to post Share on other sites
Lebro Posted November 3 Report Share Posted November 3 Mine must have been the economy version Bob Quote Link to post Share on other sites
PXC Posted November 3 Author Report Share Posted November 3 On 10/10/2024 at 3:25 PM, Lebro said: Field coils. Bob Hi Bob please see my pm. Paul Quote Link to post Share on other sites
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