jogger321 Posted April 19, 2019 Report Share Posted April 19, 2019 (edited) My TR6 after a 28 year lay up got back on the road last year after a lot of work and I've driven over 2,000 miles in it since I'm just now trying to sort out some of the more minor issues with it I've fitted the upgraded heater valve and also last week replaced the metal bulk head heater plate as my old one was very corroded and I could not get one heater rubber pipe to stop weeping...Thats all sorted and its dry now This afternoon I used the heater blower for the first time! ....Its a pull out switch that has 3 settings ...Off, Low and High Mine seems to work in OFF ok and on LOW (the fan runs) but when I pull it out to the High setting the fan appears to switch off Does anyone have any ideas please on how I should start tracking down what might be causing this please? Thankyou Edited April 19, 2019 by jogger321 Quote Link to post Share on other sites
RogerH Posted April 19, 2019 Report Share Posted April 19, 2019 Hi Jog, firstly, check that all the wires are going to the switch. Roger Quote Link to post Share on other sites
astontr6 Posted April 20, 2019 Report Share Posted April 20, 2019 10 hours ago, RogerH said: Hi Jog, firstly, check that all the wires are going to the switch. Roger +1 And the switch is fully working, these switches do fail? Bruce. Quote Link to post Share on other sites
Waldi Posted April 20, 2019 Report Share Posted April 20, 2019 I tested my switches during the major rebuild. Several had high resistance, and after spraying some contact spray, they were ok, and worked properly. Waldi Quote Link to post Share on other sites
ed_h Posted April 20, 2019 Report Share Posted April 20, 2019 If it works like my 74, and i believe it does, the low speed is accomplished by including a resistor in the path to the motor, while high speed is run direct. If the motor runs at the low switch setting, it implies that the resistor and motor are good. This just leaves the switch and the high-speed wire and it's connections. Ed Quote Link to post Share on other sites
jogger321 Posted May 1, 2019 Author Report Share Posted May 1, 2019 I've sorted it!. The switch was wired incorrectly at the back....I think its possibly me that did it that way when was driving the car every day 30 years ago!....Couldnt afford a workshop manual in those days and probably thought that looks about right! Anyway I got the wiring diagram out yesterday and changed a couple of the wires over and now its howling a gale at high speed like a good 'un ! Quote Link to post Share on other sites
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