joshua01niner Posted January 6, 2015 Share Posted January 6, 2015 Hey guys. I just recently bought a Nissan 1991 pathfinder/pickup BD25 diesel. All the gauges in the cluster work aside from the tach, do you have any ideas where the tach signal is connected to? Is it connected to the alternator or somewhere else? The tach is connected by a 4 pin socket, I've already tested it with a test light and it seemed like there is power with one wire, i guess its from the ignition key but the other two are not sending any signal. Any ideas? thanks in advance. Link to comment Share on other sites More sharing options...
Slartibartfast Posted January 9, 2015 Share Posted January 9, 2015 I don't have the manual for the diesel, so I'm not entirely sure what it hooks to. I know on the gas rigs that a nonworking tach can sometimes be fixed by tightening the brass screws holding the gauge into the cluster (that's how ground is supplied apparently). I've never been into a diesel cluster, or a gas cluster for that matter, so that's about all I can say. Link to comment Share on other sites More sharing options...
joshua01niner Posted January 9, 2015 Author Share Posted January 9, 2015 Thanks for the info Slartibartfast! it still didn't work though. I'm planning to hook it up in the W-Terminal in the alternator and see what happens.. Link to comment Share on other sites More sharing options...
Craig1902 Posted January 12, 2015 Share Posted January 12, 2015 I've got the diesel supplement for the FSM floating around here somewhere, PM me your email and I'll send you a copy Link to comment Share on other sites More sharing options...
green180 Posted January 12, 2015 Share Posted January 12, 2015 On the diesels I usually work on its plugged into the back of the alternator Link to comment Share on other sites More sharing options...
joshua01niner Posted January 12, 2015 Author Share Posted January 12, 2015 I've got the diesel supplement for the FSM floating around here somewhere, PM me your email and I'll send you a copy Thanks Craig1902! PM you already On the diesels I usually work on its plugged into the back of the alternator Where exactly is this plug? In my alternator I could see only three connections that are in it. One for the ground, the batt and the other with plugs in it. , i'll try to post some pics later. Link to comment Share on other sites More sharing options...
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