Author Topic: Intermittent tach solved  (Read 814 times)

Offline Don4107

  • Sr. Member
  • ****
  • Posts: 407
Intermittent tach solved
« on: September 06, 2013, 06:32:03 PM »
Since we picked up the 5b last year the tach only worked part of the time and NEVER when I wanted to do something like check shift points.

Hard to wiggle wires on the engine and watch tach.  Had wife watch tach while I spun the sending unit with a drill.  Working - not working -working.

Pulled sending unit out and took it to the shop.  Could not get consistent reading with an ohm meter.  Upon closer inspection of the solderless connectors, they were BOTH crimped on the insulation!   

Don 4107 Eastern Washington
1975 MCI 5B
1966 GM PD 4107 for sale
1968 GMC Carpenter