mikehopkins
New member
"gentlemen, tach in an '81
"gentlemen, tach in an '81 Tempest not working. Det-mar square body, 6000rpm unit with 3 posts; 1 to coil, 1 to power and a ground. there are also 3 sunken posts in the center tapped for screws,1 at 12:00, 1 at 6:00 and 1 at 3:00. there is a small brass jumper plate going between 6:00 and 3:00 but with only 1 screw attached at 6:00. wondering if the 3:00 screw fell out; reluctant to install and find out to prevent shorting system. no replacement tach found, planning on seperate dash mount if this one is toast. understand it is possible to test using a battery charger but unclear as to how? any help welcome."
"gentlemen, tach in an '81 Tempest not working. Det-mar square body, 6000rpm unit with 3 posts; 1 to coil, 1 to power and a ground. there are also 3 sunken posts in the center tapped for screws,1 at 12:00, 1 at 6:00 and 1 at 3:00. there is a small brass jumper plate going between 6:00 and 3:00 but with only 1 screw attached at 6:00. wondering if the 3:00 screw fell out; reluctant to install and find out to prevent shorting system. no replacement tach found, planning on seperate dash mount if this one is toast. understand it is possible to test using a battery charger but unclear as to how? any help welcome."