Tach manufacture, and...

[Ross Wooldridge]

...does it require a sending unit?

Any info on the aftermarket unit pictured below would be appreciated.

 

[Big_John]

Mid/late 60's Oldsmobile.

Here's a couple.

1964-1969 442 Console Tachometer Cutlass F85 Oldsmobile 1966 1965 1967 1968 W30 | eBay

1964 65 66 67 68 69 oldsmobile console tachometer head

 

[Ross Wooldridge]

Thanks, @Big_John. Do you know if they require a sending unit?

 

[Big_John]

Thanks, @Big_John. Do you know if they require a sending unit?

Probably not. By the mid 60's, I think most, if not all, didn't use the sender box.

 

[Ross Wooldridge]

Great, thanks!

So, if I were to want to test it, hook up to the coil and ground it? Can't remember... negative side I think...

 

[commando1]

Mid/late 60's Oldsmobile.

Here's a couple.

1964-1969 442 Console Tachometer Cutlass F85 Oldsmobile 1966 1965 1967 1968 W30 | eBay

1964 65 66 67 68 69 oldsmobile console tachometer head

Damn, you're good.

 

[bigmoparjeff]

Not exactly sure how those work. It appears that there's no battery power required.

Brown goes to coil negative.

Black to chassis ground.

Gray is power for the light bulb.


Jeff