iv got a 65 ford.not sure what the motors out of but the best iv found so far is its a 289 thats out of something in the 67s.iv tried to hook it up like normal bu t it wont work.iv even tried a differant tach.is there something with the points styl thats dif or is there just some thing im not seeing.id realy like to have a tach.pleas help

 

negitive side of the coil.-Green wire
switched Positive.-red wire
ground.-black wire.
Sould work.
Find out what motor you have. More Info is generaly better than less. 289's never came in a pickup to my knowledge and 302's not till later in the 70's

 

thats just it.i have it hooked up that way and it still dont work.would it have anything to do with the points system.

 

If the engine runs and you hooked the tach up as stated by a preivous post then my guess is you have a tach problem. If the engine runs that means the coil is operating correctly. I would double check you are on the right terminal on the coil, the same side as the wire that goes to the distrubutor. And I would check that you have a good ground. All electronics need a good ground.

Does the tach not do anything or just displays the incorrect reading?

Red wire to switched power
Green wire to negative on the coil
Black to a known good ground
White to a light switch to turn on the light in the tach.

It makes no differance the brand or size of the engine when installing a tach. They work on 4, 6, and 8 cylinder engines by hooking up as listed above. The only change to that is new engines with out distributors and then there are changes. But as long as it was a single coil fired engine points or electronic ignition no change in the wiring. There is a switch inside the tach to select the number of cylinders from 4 to 6 to 8.

Jeff

 

the ground might b it cus thes the 1 thing i havnt checked.the tach doesnt read at all