Troll Hunter Posted January 7, 2020 Share Posted January 7, 2020 As in the title. I'm starting to replace electrical systems on my rebuild and am afraid that I haven't got all the necessary grounds between chassis, engine, gearbox, transfer box etc. Please, can anybody direct me to a list or diagram that details these. There are more than enough threads that seem to be generated by a poor earth and I don't want to contribute to the list. I've searched my LR Parts Catalogue, but found nothing. Of course, old age doesn't come alone, and unexplained temporary blindness is a common failing👴😕! Many thanks in advance for any guidance anyone can give me. Mike Quote Link to comment Share on other sites More sharing options...
western Posted January 7, 2020 Share Posted January 7, 2020 on my 1989 110, the earth cables go from 1. battery negative to main gearbox/transferbox joint bolt. 2. engine earth from just under & to rear of alternator mounting to the chassis bracket rear face of left engine mounting [vehicles left not your left] 3. numerous earth wires at a screw or bolt on bulkhead [engine side] adjacent to the clutch master cylinder 4. left & right rear lights in rear corners to the wheel arch top face behind the corner covers. 5. front lights earth to the vertical part of the inner wing forward edge [bolt & nut] Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted January 8, 2020 Author Share Posted January 8, 2020 Western, Many thanks for the details. Since the earth route for many items is via the chassis or the bodywork, how is the chassis connected to the battery negative? Having really cleaned connections before bolting up do you recommend covering the connections with a protective compound - grease, silicone mastic, other??? Mike Quote Link to comment Share on other sites More sharing options...
western Posted January 8, 2020 Share Posted January 8, 2020 Chassis is connected via the engine earth to battery. A extra thick earth cable from chassis to battery negative terminal will help Use a petroleum jelly like Vaseline not normal grease. Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted January 8, 2020 Author Share Posted January 8, 2020 Many thanks for these additional details, western. Vaseline it is then, after all connections have been cleaned with fine emery cloth and done up tight. Mike 1 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 8, 2020 Share Posted January 8, 2020 The Vaseline goes on first, applied to the contact surfaces, then they are joined and tightened. I think @Bowie69 was the last to stress this on this forum. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 9, 2020 Share Posted January 9, 2020 Yep, vaseline inside the connections, stops water getting into any gaps. If you just smear in on the outside it will just get washed off in no time. Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted January 9, 2020 Author Share Posted January 9, 2020 Thank you, both, for putting me right - vaseline first, than tighten up. Mike Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 9, 2020 Share Posted January 9, 2020 Mike Here's an extract from the Defender Electrical Library document. The earth point that is often overlooked is the one at the transfer box C812/813. Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted January 10, 2020 Author Share Posted January 10, 2020 Many thanks, Peaklander. This document obviously applies to a later model Defender than mine, 1991, but it is still relevant. These points are obviously in addition to the other points detailed by western on Tuesday. Mike Quote Link to comment Share on other sites More sharing options...
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