apm
Well-Known Member
I posted this earlier in the trucks forum, but didn't find the answer. I've got a 1998 GMC Topkick with the Cat 3116. The tachometer doesn't work. The engine serial number is 9GK64306. Can anyone tell me where the tach signal comes from? Some seem to think it's from the alternator, some think a sensor on the flywheel. Any idea where to start troubleshooting?
Thanks,
Greg
Thanks,
Greg