rev counter 1.6 td how's it work

[colinMSC]

how does it work please

[lambrettalee]

runs off the alternator i believe....

[colinMSC]

go on then explain more please it would be nice if someone has more info.

[dave friday]

ok i'll have a go, the alternator produces a frequency that varies with engine speed, the rev counter measures this frequency and moves the pointer , 1000 rpm for low frequency[low engine speed] 4800rpm for high frequency[high engine speed].
how's that?!!

[Hacksawbob]

there are little men in the alternator the faster it goes the more limbs they break, this information is relayed by dieselphone to some more guys in the dash who move the needle accordingly, That do ya Col?

[colinMSC]

hi all , so as bob said its the dieselphone bit that apears not to be talking to the tacko bit. any one know how to check it out

[Hacksawbob]

Hi Col I had a look through my bentley copy it appears the deisel wiring pages aren't there someone will have it though.

[dave friday]

ok from the "w" terminal on the alternator[red/black wire]it goes to e12 [fuse box in front of van] changes to green on the way! then to d19 then red/black to d26[ still on f box then b19 then green wire to t 14 terminal 9[the long connector under the dash] your problem will may be with this connector .
good luck!.

[colinMSC]

ok thanks dave, thats what i wanted to know, i could not find it in the bently manual either bob
will have a look tomorow [so many wires ]

[Hacksawbob]

wiki'd

[Macflai]

What the blithering heck I was knocking the alternator's door and asking for the little men... but the batteries were disconnected!