dangOl'dodge
Member
- Joined
- Sep 17, 2015
- Posts
- 46
- Reaction score
- 0
- Location
- canada
- First Name
- C
- Truck Year
- 1987
- Truck Model
- r10
- Engine Size
- 4.3 tbi
hey guys,
last year I swapped my 87c10 with a 4.8 vortec/4l60e.
I am now in the process of nv4500 swapping the tranny.
before I install the tranny id like to get the tachometer working from a 1988 gmc 7000. I think it was a diesel truck it only reads 4000rpm on the tach. either way I just took the entire cluster out of the 7000 and put it in the c10. everything works except the tach.
I have the tach high and low res output set to 3 in hp tuners. I also tried wiring and 1k and 10k resistor between the 12v and signal wire.. still nothing.
I can see the tach move slightly when I start the truck. if I rev it up the tach will go up to about 100 rpm or so.. cant get any more out of it.. any ideas?
the tach has 3 wires coming out of it so I doubt the printed circuit board would even play a part in a tach not working? its wired to 12v battery, ground battery and the signal hooked up to the white wire on pin 10 of the c2 connector from the ls computer. I cant get a ohm reading with my multi meter on this wire but it is showing 4.1 volts at idle
last year I swapped my 87c10 with a 4.8 vortec/4l60e.
I am now in the process of nv4500 swapping the tranny.
before I install the tranny id like to get the tachometer working from a 1988 gmc 7000. I think it was a diesel truck it only reads 4000rpm on the tach. either way I just took the entire cluster out of the 7000 and put it in the c10. everything works except the tach.
I have the tach high and low res output set to 3 in hp tuners. I also tried wiring and 1k and 10k resistor between the 12v and signal wire.. still nothing.
I can see the tach move slightly when I start the truck. if I rev it up the tach will go up to about 100 rpm or so.. cant get any more out of it.. any ideas?
the tach has 3 wires coming out of it so I doubt the printed circuit board would even play a part in a tach not working? its wired to 12v battery, ground battery and the signal hooked up to the white wire on pin 10 of the c2 connector from the ls computer. I cant get a ohm reading with my multi meter on this wire but it is showing 4.1 volts at idle
