M9540 Tachometer Not Working

Hamboned1

New member

Equipment
M9540
Apr 2, 2024
4
0
1
Alabama
I have a M9540 the tach went out , I check all the fuses with a test light and all were good, I checked wiring connector and wiring behind cluster panel and I checked the 1 ground wire as well, could it be a sensor or a broken wire?
 

TheOldHokie

Well-known member
Lifetime Member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
7,163
3,501
113
Myersville, MD
windyridgefarm.us
I have a M9540 the tach went out , I check all the fuses with a test light and all were good, I checked wiring connector and wiring behind cluster panel and I checked the 1 ground wire as well, could it be a sensor or a broken wire?
The tachometer pickup is mounted to front of engine. Item number 60 in the parts diagram. I would start there.


Dan
 

Hamboned1

New member

Equipment
M9540
Apr 2, 2024
4
0
1
Alabama
The tachometer pickup is mounted to front of engine. Item number 60 in the parts diagram. I would start there.


Dan
I replaced the tach sensor on front of engine and had broken red/blk wire and I repaired it and tach is still not working?
 

TheOldHokie

Well-known member
Lifetime Member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
7,163
3,501
113
Myersville, MD
windyridgefarm.us
I replaced the tach sensor on front of engine and had broken red/blk wire and I repaired it and tach is still not working?
Broken wire is probably not a coincidence. Does tje WSM have pinouts and/or diagnostics for testing sensor and harness wiring?