Hilux tacho

I may have a manual, what engine
Ray

i have a diesel navara with the same problem, i took out the sender which is a magnet in the engine block on the front, behind the fan belt. My multimeter did not pick up any signal form the sender, a new one is $485 from nissan (rip off merchants) and i tried to send a low voltage to the tach to get it to go but just blew a fuse - do you know how these this system actually works??

Hi
I will have at look at work tonite
If they are the same as the Patrol the senders output is A/C the unit is a generator
Ray

JJ, can only give you a hand `in general' not overly familiar with the Yoda motor in particular.

Most non-electronic diesels rely on a pulse generator of some sort to count the revs. Either in the fuel injectio pump or at the front of the block as mentiioned. I know my Isuzu has its in the FIP, just a magnetic pickup that counts the revs of the FIP so I assume there are two magnets so one revolution of the FIP will give the two pulses the tacho needs to signal the two revolutions of the engine.

I dont think you could supply any amounts of voltage to test the guage, but maybe once you locate the sender, an analogue multimeter might be able to signal whether the sender is pulsing while the engine is running! Process of elimination!

I do know my is sticking somehow...its does jump and drop 500 revs occasionaly, very obvious and not worth me ripping everything apart at the moment!!

Goodluck with it!

Matt.