NeilR Posted November 13, 2019 Report Share Posted November 13, 2019 Is there a recommended method for earthing the steering column on a TR4 to enable the horn push to earth it when pushed? Quote Link to post Share on other sites
jerrytr5 Posted November 13, 2019 Report Share Posted November 13, 2019 Is it the same as on the IRS cars with an earth from the steering rack to chassis? Don't rely on the splines at the U/J's for continuity either, use a link wire between pinch bolts. Jerry Quote Link to post Share on other sites
John Morrison Posted November 13, 2019 Report Share Posted November 13, 2019 Welcome Neil. Earthing the horn push to make it sound is the Triumph Way, Check you have the braided earth straps that 'Bridge' the rubber doughnuts (Two of) on the column, - often left off. John. Quote Link to post Share on other sites
RogerH Posted November 13, 2019 Report Share Posted November 13, 2019 Hi Neil, firstly under the horn push button on tje steering wheel there is a spring loaded contact Item 53 https://www.moss-europe.co.uk/shop-by-model/triumph/tr2-4a/steering-suspension/steering/steering-tr4-4a-1961-67.html Also at each of the two rubber UJ there should be an earth link wire connect each side of the rubber to the steel steering rods. These must be fitted Roger Quote Link to post Share on other sites
MKTR Posted November 13, 2019 Report Share Posted November 13, 2019 I seem to recall that when I worked on my intermittent car horns, as well as all the above I needed to replace a braided earth from the steering rack to the chassis. Quote Link to post Share on other sites
Andy303 Posted November 13, 2019 Report Share Posted November 13, 2019 5 hours ago, RogerH said: Hi Neil, firstly under the horn push button on tje steering wheel there is a spring loaded contact Item 53 https://www.moss-europe.co.uk/shop-by-model/triumph/tr2-4a/steering-suspension/steering/steering-tr4-4a-1961-67.html Also at each of the two rubber UJ there should be an earth link wire connect each side of the rubber to the steel steering rods. These must be fitted Roger Item 71, the wire lead, needs to snake though the rubber doughnut hole from one side to the other, to make the ground circuit. Also Item 94, the lead from the rack to the chassis, which is necessary if your steering rack is rubber mounted (some use the solid mounts). The horn ring, Item 4, is "live", supplied by the black and purple wire from the loom under the steering column. Pushing the horn button makes the contact to ground via the stiff copper wire/spring that holds the button against the steering wheel hub, and thence through the steel inner column. Quote Link to post Share on other sites
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