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Found 1 result

  1. Hey amigos, So, I've been trying to go through the car (a '78 280z Black Pearl) bit by bit to work out the electrical bugs (got the horn and the hi-beams working) and now I'm moving on to the tach. Since I acquired the car last September, it hasn't worked and has stayed frozen at 700 rpm. I've scoured the forum and found mostly things to do with 240z tachs, compatibility problems with aftermarket coils (mine is stock) and one thread that suggested a frozen tach was not wiring-related, but a failure in the tach itself instead. I've checked the connections at the back of the tach and they all seem clean and intact. I've also cleaned the contacts for the wires that connect to the coil. Here's my question (in 2 parts): Is the frozen needle a sign of a burned out board in the tach and thus the whole unit needs to be replaced/rebuilt, or could a wiring issue cause this? I'm hesitant to attempt to pull the tach if I don't need to because I have a dash cap and it's pretty tight up front. The second part of my question: can anyone tell me which wires to chase/test or where to start? I'm pretty new to Datsuns and haven't done much electrical work on cars. The mechanical stuff, plenty, but I'm kind of a rookie in the electrical department. I do have the FSM for the car, but the electrical section is pretty overwhelming. Many, many thanks in advance! - Paul
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